Replacing tired 305 with 350 in 1995 K1500

[Pigsticker]

I need to replace my 305 with a 350. Both trucks are 1995. Mine is a 4 wheel drive with the 5 speed and the loaner truck is a 2 wheel drive with an automatic. Would there be any problems since one is an automatic and 2 wheel drive and the other is a 5 speed and 4 wheel drive? I’m only replacing the engines.

 

[PlayingWithTBI]

Would there be any problems since one is an automatic and 2 wheel drive and the other is a 5 speed and 4 wheel drive? I’m only replacing the engines.

There shouldn't be a problem, you'll need a PROM for the 350 with 4WD for your ECM

 

[Schurkey]

Keep the 350 injectors and knock sensor with the 350.

As said, you'll need proper ECM tuning.

You're taking the engine out of a "LOANER" vehicle???

 

[Pigsticker]

The 350 is coming from a local bone yard. I just called it a loaner vehicle.

 

[Schurkey]

More like "DONOR" vehicle.

 

[Pigsticker]

Exactly

 

[Pigsticker]

So my ECM should be fine. I just need to replace the PROM that goes with the 4 wheel drive and 5 speed?

 

[Nad_Yvalhosert]

So my ECM should be fine. I just need to replace the PROM that goes with the 4 wheel drive and 5 speed?

And the TBI assy. The injectors are different between 5.0 and 5.7

 

[Pigsticker]

Ok. Thanks for the help. Got the 5.7 injectors ordered.

 

[Pigsticker]

Where does a person go to find a prom for my application? Here’s what is in my truck with the 305 and 5 speed.