LT1 swap into GMC Sierra
Question:
> I’m in the process of swapping my stock 305 for an LT1 in my ‘90 GMC > Sierra. I plan on using my current intake manifold for now and everything > looks like it’s going to fit except for the timing chain cover. The bolt > patterns on the 2 covers appear different. Does anyone know if the 305 > cover will fit on the LT1 and if not where can I get one that will fit?
Assuming you have the 2d generation LT1 of course, the bolt patterns should be the same. AC-Delco part numbers show the same from ‘69-’96. In order to get the LT1 performance you’re going to have to do some serious reprogramming with the ECU. Additionally, your distributor must be made compatible with the LT1 specs. The only remaining drawback is your 305 TBI system. This will prove to be a hindrance to performance.
Response:
I’m in the process of swapping my stock 305 for an LT1 in my ‘90 GMC Sierra. I plan on using my current intake manifold for now and everything looks like it’s going to fit except for the timing chain cover. The bolt patterns on the 2 covers appear different. Does anyone know if the 305 cover will fit on the LT1 and if not where can I get one that will fit?
