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Author Topic: 87 K10 350 to 454 swap ?  (Read 12248 times)

Offline sgreen3

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87 K10 350 to 454 swap ?
« on: December 02, 2013, 03:17:46 pm »
Hello everyone, Im about to start the upgrade of putting a bigblock into my truck. my only question is what mounts an clamshells should I use 350 or 454? Although I know either will fit, but will either sit the engine at the correct highest in the frame rails? Thanks fellas!
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Offline Engineer

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Re: 87 K10 350 to 454 swap ?
« Reply #1 on: December 02, 2013, 09:02:45 pm »
I found with my 4x4 trucks you need the clamshells off of a 454 in order for the 7 blade clutch fan to not rub the bottom of the fan shroud.

If you are not worried about that then either the BB or SB clamshells will work. Some say the rubber frame mounts are different but I have never been able to find what that difference is.

BTW, the GM part number for the 454 clamshells is 14067103. This number served trucks from 1973 to 2000 but that number has been discontinued. However I'll post it so if you need you may find a set somewhere.
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2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline sgreen3

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Re: 87 K10 350 to 454 swap ?
« Reply #2 on: December 04, 2013, 03:24:35 pm »
Awesome thanks for your help! I plan on running an electric fan set up so I don't guess I would have to worry about it then correct?
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Offline Engineer

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Re: 87 K10 350 to 454 swap ?
« Reply #3 on: December 04, 2013, 03:41:21 pm »
You will probably be alright.

Just make sure your rubber frame mounts are gtg.
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2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline rich weyand

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Re: 87 K10 350 to 454 swap ?
« Reply #4 on: December 04, 2013, 05:16:04 pm »
Did you see my PM where I found bb engine mounts?
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Rich

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

Offline sgreen3

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Re: 87 K10 350 to 454 swap ?
« Reply #5 on: December 04, 2013, 06:04:56 pm »
Ok great Ill check them and make sure.


An yes I did, ill look into those as well, thanks!
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Offline Captkaos

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Re: 87 K10 350 to 454 swap ?
« Reply #6 on: December 04, 2013, 07:04:07 pm »
If you use E-fans the motor mounts don't matter. 
The mounts for the frame were the same for V8 and I6.
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Offline pholliday1

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Re: 87 K10 350 to 454 swap ?
« Reply #7 on: December 04, 2013, 09:14:40 pm »
Are you keeping everything tbi? And if so do you have the wiring harness for the 454
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VETERAN AND LIFETIME NRA MEMBER. WHAT DO YOU STAND FOR?
1991 V3500 CREWCAB SRW 454TBI GMC
1991 v3500 crewcab SRW 454tbi 480le 6" lift
1990 V3500 crewcab Dana 60 FF 14b 5:38 ratio 40 inch 11" lift
1989 v3500 crewcab 454TBI 5" lift

Offline sgreen3

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Re: 87 K10 350 to 454 swap ?
« Reply #8 on: December 06, 2013, 11:48:36 am »
Oh no Im gonna be running a 700 Holly on it, most likely.
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Offline sgreen3

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Re: 87 K10 350 to 454 swap ?
« Reply #9 on: December 06, 2013, 11:49:24 am »
Figured Id post a pic of the truck in question  ;)
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Offline Engineer

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Re: 87 K10 350 to 454 swap ?
« Reply #10 on: December 08, 2013, 08:39:10 am »
Nice rig. If it were mine I'd put a factory grille, and headlight bezels back in it.
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2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline 454Man

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Re: 87 K10 350 to 454 swap ?
« Reply #11 on: December 08, 2013, 09:01:01 am »
Digging the ride Bro!

What's under the hood??? If you have to ask maybe we shouldn't race...

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Offline sgreen3

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Re: 87 K10 350 to 454 swap ?
« Reply #12 on: December 08, 2013, 01:50:07 pm »
Gonna have a 454 in it. going to pick up the donor engine on Friday  ;D
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Offline sgreen3

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Re: 87 K10 350 to 454 swap ?
« Reply #13 on: December 15, 2013, 10:37:24 am »
Im happy to report this little fella made it home  ;D
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Offline 454Man

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Re: 87 K10 350 to 454 swap ?
« Reply #14 on: December 15, 2013, 10:38:21 am »
Nice!

What's under the hood??? If you have to ask maybe we shouldn't race!

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