1998 Chevy 3500 350 To 454 Swap

[superdavewis]

I picked up a nice 1998 chevy 3500 4x4 that has a bad 5.7 motor in it. I am having a hard time deciding what motor to put in this, I am looking at either putting a 383 sb or 454 bb in it. I know if I put the 383 in I would just need to adjust the pcu on a dyno. My question is would a 454 bolt up to everything in the truck or would I have to get a diffrent bell housing? Would I have to get a new computer for the fuel injection? Any and all info would be great. I am looking into making this truck into a work and play truck I would be using it for snow plowing in the winter and truck pulling in the summer. If I build a 383 I want to try and get around 400 hp that is why I am wondering if I would be better off putting a BB in if it will not be to hard. Thanks guys.

[becker87]

How about a 12 valve cummins, that way you don't have to worry about all that computer stuff and you can make a ton of tourqe out of those with just a few simple mods. If i was in your situation i would consider the cummins very hard.

[96chevy7.4L]

Wont be hard to put the Big Block in it at all. You'll have to change the connectors over but not much else. You already have a 4L80E transmssion presumably.

[superdavewis]

Wont be hard to put the Big Block in it at all. You'll have to change the connectors over but not much else. You already have a 4L80E transmssion presumably.

 

 

Will I need a new harness and pcu for a 454 or will the one in my truck for the 5.7 work?

[96chevy7.4L]

If you can get a new harness for the 454 it would be easier. But you can change over the connectors from one to the other.