5.7 LS1/T56 swap for 305/5spd '89 C1500

[gl18rider]

Thanks for the setback info and link. I did more research and talked to S&P. They had some interesting feedback. To start with, he thought the non-setback should work. He said it depended on the exhaust manifolds. TMJOKI, what year is the LS1 your putting in?
The other interesting approach he had was to keep the original computer for ABS, speedo, etc. I thought everyone was ditching their OBS PCM's and just using the new one? Is there any reason the new PCM would need the speedo if I have manual transmission? I thought I had a decent handle on the computer direction, but now I'm rethinking it.

[coastsidekid]

The other interesting approach he had was to keep the original computer for ABS, speedo, etc. I thought everyone was ditching their OBS PCM's and just using the new one? Is there any reason the new PCM would need the speedo if I have manual transmission? I thought I had a decent handle on the computer direction, but now I'm rethinking it.

Im curious if i need the computer or not too. Not quite sure on what exactly the computer controls

[tmjoki]

i got a full 5.3l setup from a 99 pickup. i know its not a true ls1 . From what i have been reading those dirty dingo mounts look good, but the ones on ebay are really cheap and look great. i have problems getting them in canada and shipping time is terrible so that is why i am going to just make something work.

[92 6.0]

I also got rid of my stock computer but mines a 92. I have a buddy that just put an 8.1 in his 90 model but upgraded to a 92-94 guage cluster.