I am still gathering what I need for parts and information to swap a TBI into my carbed engine. I have an '83 305 with a mild Summit K-1102 cam (.420/.442, 262/272, 112*), stiffer springs, Edelbrock non-egr performer intake. Using an HEI distributor I have found that I need 20* base timing for best performance (no detination). At the factory 8* the engine will barely run. Summit recommends at least 4* more timing for this cam.

I know the computer controller dizzy is supposed to be set at 0*, but I wonder if that will work ok with my engine. Is it possible or even advisable to add more base timing to make up for non-stock cams?

Last question (for now :): Will 18inHg vacuum at idle work with the stock computer or am I going to have to get a custom chip or self learning computer?