Sorry folks, Giot distracted, Finally got the 3.42s installed, and found a nice old System 2000 scanner for 50 bucks and bought the TPS and rich idle stop tools off thextons website directly for 25...

Took the first road trip in it and the result was 21 mpg so Its close and thats with a 3.42 gear stockers where 2.41s.

good thread, I went over today so I could bring the car home from the shop to my house...(Hard to drive 2 vehicles at the same time. ) and grabbed two proms I had and I was correct The one chip is...

yeah I think 86 and 87 are one year only PCMs figured they were different before looking them up seeing as how My current 86 prom is only a 3 letter code VS 4 digits for the 87 and newer
I read a...

Ok folks, back again with a New project,, Operation "CCC system Restoration"
I have purchased a fine survivor of a 305 ccc 4 brl 2004r G body , stashed away in a crappy 1 car garage since the...