1994 K1500 Big Block??

Vettepilot · Jun 15, 2024

So, I built a 1980 K5 Blazer with a warm/hot 454 and I dearly loved it. I'm careful, so I never broke it. Well, I did snap a u-joint and spit the driveshaft out once on a over excited full throttle 6500 rpm shift to second gear, but other than that, no problems. I drove it for 20 years--> best swap I ever did.

So now, I've got a 1994 GMC K1500 4x4, and a bunch of big block parts. I am seriously thinking of big block swapping it. I know it will fit and all, I am just wondering about headers. I don't believe Chevy ever offered a big block in an IFS, Half-Ton 4x4, right??

So, are headers, (full length) available??

Now please, please, don't say "LS". It just ain't gonna happen, so please save your breathe.

Thanks!!
Vettepilot

b454rat · Jul 8, 2024

I would think a set off a big block truck, K2500/3500 would fit. As far as engines, mounts and whatnot on that part of the frame are the same between 1/2-1 ton.

someotherguy · Jul 8, 2024

Vettepilot said:
So, I built a 1980 K5 Blazer with a warm/hot 454 and I dearly loved it. I'm careful, so I never broke it. Well, I did snap a u-joint and spit the driveshaft out once on a over excited full throttle 6500 rpm shift to second gear, but other than that, no problems. I drove it for 20 years--> best swap I ever did.

So now, I've got a 1994 GMC K1500 4x4, and a bunch of big block parts. I am seriously thinking of big block swapping it. I know it will fit and all, I am just wondering about headers. I don't believe Chevy ever offered a big block in an IFS, Half-Ton 4x4, right??

So, are headers, (full length) available??

Now please, please, don't say "LS". It just ain't gonna happen, so please save your breathe.

Thanks!!
Vettepilot

You're correct. The only way you were getting a factory big block in a GMT400 1500 truck was in the 454SS, which of course was 2WD.

Richard

mwilliams55555 · Jul 8, 2024

Brother keeps telling me to bring this home and work with it, not a big block fan myself

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b454rat · Jul 9, 2024

Id rather have a big block over a small block, especially in a heavy pig of a truck.

Vettepilot · Sep 2, 2024

Well, I started to make a new thread, as I'm back to this idea.

But before I spend the money freshening up my big block to go in, I'll ask once again.

Does anyone know of headers, preferably cheap ones, that will fit a big block in a 1994 K1500 4x4??

Please!

Thanks!
Vettepilot

1994 K1500 Big Block??

Vettepilot

I'm Awesome

b454rat

I'm Awesome

someotherguy

Even more awesome in person

mwilliams55555

I'm Awesome

b454rat

I'm Awesome

Vettepilot

I'm Awesome

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