Wanted PROM chip for 350 w/manual transmission

[gone huntin]

My son and I are building him a truck and converting it to TBI. The donor was an automatic and we are running an SM465 so we need the chip for a manual shift from an '87 or up.

 

[campfire]

@MTChevy @Metrodps

What happened to the old chip from the Suburban?

 

[Bent77]

My son and I are building him a truck and converting it to TBI. The donor was an automatic and we are running an SM465 so we need the chip for a manual shift from an '87 or up.

Was the donor truck an 87-89 th400, non-lockup?

If so, use it. You will need a VSS

 

[gone huntin]

The donor was a '90 V2500 with a th400 originally. It has the 8747 ECM in it. I bought a VSS from Jagsthatrun.com.

 

[MTChevy]

I believe the original ecm was in the box in the back