305 to 350 (Need Help)

[colthensley454]

I have a 1987 Chevy Silverado V10 with the 305/700R4 tbi fuel injection. A while back the 305 finally expired so I'm wanting to do a engine swap. I bought a 350 crate engine (VCM6 from AutoZone)

What I'm asking is; What parts do I need to change or modify for the swap? I'm wanting to keep the TBI just for simplicity instead of doing a intake/carburetor swap.

I've looked and seen plenty of forums say the computer is a problem and a few other smaller things. This is my first engine swap so any help is greatly appreciated.

 

[Honky Kong jr]

Hey @1987 GMC Jimmy whats he gonna need to do this? I'm thinking ECM at the least.

 

[4WDKC]

there's no specs on the Autozone site so its hard to know if it will work well with the ecm. A chip stock chip and 350 tbi injectors at a minimum

 

[colthensley454]

This is what I've been told I needed so far.
350 harmonic balancer
350 injectors
350 knock sensor
350 ESC module
350 chip

For the injectors, I have a TBI I know came off of a 350 Suburban.

 

[1987 GMC Jimmy]

Hey @1987 GMC Jimmy whats he gonna need to do this? I'm thinking ECM at the least.

He's gonna need a new PROM (both use 7747 ECM) and new injectors at the least. It's gonna run lean otherwise. I think it's necessary to also replace the knock sensor and ESC module and the balancer. I double checked the part numbers just to be safe. It makes sense considering the compression ratios between the two. Everything else should be good to go.