LT1 aluminum heads swap

[superfragl]

Thank you all for good advise.

I compared the bins for a 94 Firebird ECU I had as a spare and original Fleetwood ECU and found that the Firebird timing tables are more conservative at higher RPM, usually by 2-3 degrees, even by 5-6 degrees in some cells. Other multipliers and routines that affect timing are pretty close.

Given all that I think it is safe to install the 95 cam (a bit more duration and lift) and heads (less weight and higher compression) and leave the ECU bin as is and see how the engine runs.