Camel Hump Heads

[Kusto]

Your finders fee......

[jwag30]

Try your local chevy dealer go to parts dept. get a gm performance parts catalog if u still want to try the vortec may save alittle or not?

[75 C20]

If you have any junk yard they should be easy to snatch off of a newer model chevy 350.

[chevyfan]

Where in Alberta are you? I'm just outside of sherwood park and theres a few places in Edmonton that have decent priced stuff. JBs has aluminum heads on sale occasionally for a good price but you can sometimes find good deals elsewhere.

[Kusto]

I am located in Grande Prairie, Alberta.  The engine just arrived and got the following numbers.

Block Casting # 3970010 - a quick search found that it was cast between 69-79 (BJ - Big Journal?) 2 or 4 bolt main 185-370Hp depending on application.

Heads # 462624 - 79-85, 1.94 intake and 1.5 exhaust, 76cc chamber - used on 350 and 400 sb

Intake # 14014440 - ??

pulled a couple of plugs and it appears that the pistons are domed with dishes for valve clearence?

[HAULIN IT]

Appears to be a regular mid-late '70's 350, should be good for a start. If the pistons have been indeed replaced with domed ones, you will want to be careful with the head chamber size (your double hump or Vortec's will be too small). You will quickly have an engine that won't like pump gas. Sounds like an "Old school" build..."You need domed pistons to get the compression up", the builder was most likely over 50 or was being mentored by someone over 50, built about 10 years ago. Lorne

[VileZambonie]

domed with valve relief? If they were domed how would you see both reliefs? Might wanna look again just to be sure

[Kusto]

I used a Rigid camera that has a light and uses fibre optics to transmit the image to a screen on the tool.  Yes I could see both reliefs because I kept pulling plugs until I found a cylinder that was at the bottom of the stroke so I could see the top of the entire piston.

The dude I got it from said he had it rebuilt 2 years ago.  Maybe these pistions were used to increase compression with the stocker heads?  I was thinking of taking the heads and intake right off so I can take a good look at the cylinder walls.

[Russ130]

Well I guess that answers your original question. Putting the camel humps on is not an option with domed pistons if you plan on running pump gas. Piston to valve clearance is going to be one of your main concerns with any mod that effects the valvetrain. I'd put the motor in and see what it does.

[Kusto]

I think I'm gonna pull the heads any way and take a real good look at things.  Since the motor hasn't been fired after the rebuild, the head gaskets should still be good.

In the event that they are indeed domed, I will leave teh heads as they are for now and maybe save up for new top end by the winter and then switch to a good set of aluminum heads.

Thanks, but as I'm sure you are all aware, these things are ever evolving and I will likely change my mind 10 more times before I get this thing on the road.

Thanks again.

[Russ130]

forget about reusing the head gaskets. Once you torque them down you can't unbolt and reuse them. No problem though sbc head gaskets are cheap enough.

[VileZambonie]

Agreed, do not reuse the head gaskets. Take pix when you get the heads off.

[mike_hd1340]

I would'nt use the double humps they were good in there day but are nothing compared to the heads you can buy now.  If all your wanting is low end torque,  look at something like the World Products  s/r torquer heads, I think you can get them with the 76cc chambers that you will need with dome pistons to keep your compression reasonalble,  and a cam around 210-220 duration @.050 with a lift around 450-470.  Put that together with a set of 4:10-4:56 gears and you can smoke the tires until you let out of it. 

[78 Chevyrado]

Do the '67 heads have the accessory bolt-holes in the ends?  just a thought...

[mike_hd1340]

No...But they can be drilled and tapped