What changes to set up should I make, if any, when replacing cast iron heads with aluminum. Specifically, I understand aluminum scavenges heat faster and allows the combustion chamber to run cooler. I was running 35 degree BTDC total advance in my last set up, maybe advance the timing a bit more? Compression ratio (9.6:1 in old setup), go higher? I usually run 93 octane or 100 if I can find it.
I have a Gen VI 502 block (casting 10237300) and I am replacing my Gen V cast iron (casting 14097088) heads with Dart Pro 1 aluminum heads with the 310cc intake runners (the mild version).
I have a roller cam with 580 lift, 240 duration, Vic Jr. air gap, Holley 850, EMI Thunder, MSD, Berk 12JG w/ plate, A/B mag/bronze, shoe, diverter spinning about 5,100 rpms in tight pump (old heads).
Any other setup changes to consider?