Author Topic: New heads or new long block?  (Read 15315 times)

Offline English

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Re: New heads or new long block?
« Reply #15 on: June 24, 2015, 01:14:10 AM »
I would try the 260 before swapping in a cam. Especially if it will void the warranty.

The 454s of the era of our trucks were only 230hp, but they were also 380tq. The 260hp 350/5.7 should move the truck around quite respectably especially considering that the truck has a manual transmission.


And as an additional thought I'm predicting English will soon be wearing Levis, cowboy boots, a New York Yankees baseball cap, and listening to 80s Southern Rock........once you've been bitten by the bug......

Haha, I'll confess right now that I bought a Kansas album purely to listen to in the truck  :-[

Offline LTZ C20

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Re: New heads or new long block?
« Reply #16 on: June 24, 2015, 01:29:18 AM »


And as an additional thought I'm predicting English will soon be wearing Levis, cowboy boots, a New York Yankees baseball cap, and listening to 80s Southern Rock........once you've been bitten by the bug......

Hahaha, only thing is that hat would be better suited if it was a faded, vintage Chevrolet type with a few wear spots and a small tear in the bill.
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Offline LTZ C20

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Re: New heads or new long block?
« Reply #17 on: June 24, 2015, 01:35:06 AM »


There are a number of companies that build engines per customer request.

Ahem, permit me to draw your attention to my username sir. I'm in the land of your forefathers! Not quite so easy over here I'm afraid. There are a few places that do builds, but they're way out of my price bracket. The company that I'm planning on getting the longblock from want £300 just to change the camshaft. That's with an engine that's not even in a vehicle!

I think I live in the wrong country  :'(

I didnt forget, I just wasn't sure how you were planning on getting or doing all of this so I just threw the ideas out anyway. Some of it may or may not be useful.

On another note, my mother was born is Sydney, Australia. So I'm half part of the people who got kicked out of the land of my forefathers.

Ah sorry, I thought you had assumed I was in the US.
Everything's do-able over here, just a lot more expensive. For example, the same long block that costs $1500 from jegs is going to cost me $2800.

Apologies for the Botany Bay thing, I think people got kicked out just for stealing apples, cor blimey guv'nor!
It's all good. I just wasn't sure how much MORE expensive it will be. By the way, one of my favorite TV shows of all time is or should I say was your Top Gear.

I think being part Aussie is where my rebellious side may come from, I got kicked out of class a few times when I was in school for being, as my grandma so wonderfully puts it, a cheeky buggah.
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Offline rich weyand

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Re: New heads or new long block?
« Reply #18 on: June 24, 2015, 09:13:21 PM »
I would try the 260 before swapping in a cam. Especially if it will void the warranty.

The 454s of the era of our trucks were only 230hp, but they were also 380tq. The 260hp 350/5.7 should move the truck around quite respectably especially considering that the truck has a manual transmission.


And as an additional thought I'm predicting English will soon be wearing Levis, cowboy boots, a New York Yankees baseball cap, and listening to 80s Southern Rock........once you've been bitten by the bug......

Haha, I'll confess right now that I bought a Kansas album purely to listen to in the truck  :-[


Nah, you want Marshall Tucker Band....
Rich

"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift

Offline rich weyand

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Re: New heads or new long block?
« Reply #19 on: June 24, 2015, 09:16:41 PM »
You know, if you're over in Jolly Old, the warranty might not be worth bugger.  In which case, getting the 350/260hp long block and swapping in a 12-300-4 or 12-230-2 cam might be worth it.  If you do that before it is run AT ALL, you don't even need to change out springs or lifters.
Rich

"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift

Offline Don5

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Re: New heads or new long block?
« Reply #20 on: June 24, 2015, 09:26:06 PM »
I would try the 260 before swapping in a cam. Especially if it will void the warranty.

The 454s of the era of our trucks were only 230hp, but they were also 380tq. The 260hp 350/5.7 should move the truck around quite respectably especially considering that the truck has a manual transmission.


And as an additional thought I'm predicting English will soon be wearing Levis, cowboy boots, a New York Yankees baseball cap, and listening to 80s Southern Rock........once you've been bitten by the bug......

Haha, I'll confess right now that I bought a Kansas album purely to listen to in the truck  :-[


Nah, you want Marshall Tucker Band....

Or some  Molly Hatchet and some Outlaws too.. Can't forget The Allman brothers or Lynard Skynard also!!
It's been a LONG time since I have been called a newbie. Just sayin....

1979 GMC K15 355, SM 465, 205, 3.73 Dana 44 with a Spartan Locker, 12 bolt Eaton limited slip and 6 inch lift with 36 x 12.50 Super Swamper TSL's.

Offline LTZ C20

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Re: New heads or new long block?
« Reply #21 on: June 25, 2015, 01:20:06 AM »
You know, if you're over in Jolly Old, the warranty might not be worth bugger.  In which case, getting the 350/260hp long block and swapping in a 12-300-4 or 12-230-2 cam might be worth it.  If you do that before it is run AT ALL, you don't even need to change out springs or lifters.
There's that idea too.
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Offline English

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Re: New heads or new long block?
« Reply #22 on: June 27, 2015, 07:19:52 AM »
You know, if you're over in Jolly Old, the warranty might not be worth bugger.  In which case, getting the 350/260hp long block and swapping in a 12-300-4 or 12-230-2 cam might be worth it.  If you do that before it is run AT ALL, you don't even need to change out springs or lifters.

Do you have any torque/hp curves saved from when you were cam shopping? Any chance of posting them here or in a PM, as I'm unable to download the Comp Cams dyno software.

I've spoken to the vendor and they offer their own 12 month warranty. I think they'll be happy to swap the cam for me and maintain the warranty, so might be going down that route.



Edit- Whoops! Just read your previous post and I'm following the hyperlinks now, I think your fullsizechevy.com post has all the info I need, thank you
« Last Edit: June 27, 2015, 07:26:51 AM by English »

Offline English

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Re: New heads or new long block?
« Reply #23 on: June 29, 2015, 03:48:54 PM »
Okay here's another question...

I'm in discussion with the vendor about swapping the cam. He says to check if there are any other parts that are required to be changed with this cam (like springs). I've been on the Comp Cams website and it says if I have "self aligning rocker arms" I need an additional rocker arm kit to go with the cam.

So, does a brand new GM350/260 have self aligning rocker arms? The kit costs more than the cam!

Offline rich weyand

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Re: New heads or new long block?
« Reply #24 on: June 29, 2015, 05:51:30 PM »
I put the 12-300-4 in a nearly new 350/290 (same as 350/260 except for the cam) and the only thing we replaced was the lifters, because they had bedded in.  You can put the 12-300-4 or 12-230-2 in a new 350/260 GM engine with no other changes -- not even lifters as long as the engine hasn't been run yet.
Rich

"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift

Offline English

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Re: New heads or new long block?
« Reply #25 on: July 17, 2015, 02:08:08 PM »


Yeeeeeeeeeeeeeeeah!

Ordered on Monday, arrived Thursday. Not bad, considering I'm on the other side of the Atlantic! Now just waiting for the shipment of long blocks to arrive at the vendor's...

Offline rich weyand

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Re: New heads or new long block?
« Reply #26 on: July 18, 2015, 12:53:28 AM »
12-300-4.  I think you'll love it. 

That cam is also very educational: it will teach you what tires cost if you're not careful.
Rich

"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift

Offline LTZ C20

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Re: New heads or new long block?
« Reply #27 on: July 18, 2015, 03:07:43 AM »
12-300-4.  I think you'll love it. 

That cam is also very educational: it will teach you what tires cost if you're not careful.
Then I should be a freakin doctor lol.
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Offline English

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Re: New heads or new long block?
« Reply #28 on: July 18, 2015, 07:51:11 AM »
12-300-4.  I think you'll love it. 


I flamin' hope so! I think I've read all your posts across various forums, thanks for sharing your experience.
I'm getting the 350/260 as opposed to the totally unsuitable 350/290, but I'd still like to take the opportunity to stick the "torquiest" (is that a word?) cam in there before the engine goes into the truck. A lot cheaper to do it beforehand

Offline rich weyand

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Re: New heads or new long block?
« Reply #29 on: July 18, 2015, 12:47:15 PM »
Indeed.  It's about $1000 labor (local shop rate $75) to change the cam after the fact.

Ask me how I know.  <sigh>
Rich

"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift