Just curious, I have to replace my busted engine in my 91 K1500. Its got the 350 v8 and I was wondering if it was possible to put a bigger engine in that I could buy used... Like out of a bigger Chevy truck?

 

with the proper tools and know how anythings possible. hardest part to me would be the computer swap and wiring. things like that

 

If it is an everyday driver wouldnt reccomend it!! But if it isnt you can either bore your 350 out and put a 400 crank on it and make a 383 stroker or you can put a big block 454 in it!

 

Yeah I was seein the 454... likin that idea... lol but would it require modifications or just slap right in?

 

motor mounts i think is the only real fitment issue. im not sure how big the engine bay of a 91 is but in my 89 2500 i had u could fit just about anything in there

 

The 454 will need different motor mounts, a bigger radiator, the computer upgraded for the added fuel consumption, and the transmission bolt pattern is different from a 350, IIRC. I say stay away from 454. If you want added power, go with a 383. I have a 1991 with a 454 and would rather have a 350 in it anyday. The pros of a 454 are outweighed by the cons.