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73-87 Chevy _ GMC Trucks => Performance => Topic started by: sgreen3 on December 02, 2013, 03:17:46 pm

Title: 87 K10 350 to 454 swap ?
Post by: sgreen3 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!

Title: Re: 87 K10 350 to 454 swap ?
Post by: Engineer 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.

Title: Re: 87 K10 350 to 454 swap ?
Post by: sgreen3 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?

Title: Re: 87 K10 350 to 454 swap ?
Post by: Engineer on December 04, 2013, 03:41:21 pm

You will probably be alright.

Just make sure your rubber frame mounts are gtg.

Title: Re: 87 K10 350 to 454 swap ?
Post by: rich weyand on December 04, 2013, 05:16:04 pm

Did you see my PM where I found bb engine mounts?

Title: Re: 87 K10 350 to 454 swap ?
Post by: sgreen3 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!

Title: Re: 87 K10 350 to 454 swap ?
Post by: Captkaos 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.

Title: Re: 87 K10 350 to 454 swap ?
Post by: pholliday1 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

Title: Re: 87 K10 350 to 454 swap ?
Post by: sgreen3 on December 06, 2013, 11:48:36 am

Oh no Im gonna be running a 700 Holly on it, most likely.

Title: Re: 87 K10 350 to 454 swap ?
Post by: sgreen3 on December 06, 2013, 11:49:24 am

Figured Id post a pic of the truck in question  ;)

Title: Re: 87 K10 350 to 454 swap ?
Post by: Engineer 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.

Title: Re: 87 K10 350 to 454 swap ?
Post by: 454Man 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...

Title: Re: 87 K10 350 to 454 swap ?
Post by: sgreen3 on December 08, 2013, 01:50:07 pm

Gonna have a 454 in it. going to pick up the donor engine on Friday  ;D

Title: Re: 87 K10 350 to 454 swap ?
Post by: sgreen3 on December 15, 2013, 10:37:24 am

Im happy to report this little fella made it home  ;D

Title: Re: 87 K10 350 to 454 swap ?
Post by: 454Man on December 15, 2013, 10:38:21 am

Nice!

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

Title: Re: 87 K10 350 to 454 swap ?
Post by: frotosride on December 22, 2013, 03:02:55 pm

So next question is how are you going to tackle the "little fella"...stock/mild or fun?