602 crate on 4412 holley what is proper jetting?

[dirty30]

Need to know what proper jets would be in 602 crate with 4412 holley?

[dynoman14]

Depends on who built the 4412 and what has been done to it.

I have had them range from 68-82 on main jets.

With a pretty much stock one you could start at 76 and be pretty safe if you were running decent fuel and 34-36* timing.

[dirty30]

gm 602 crate

Stock holley 4412 new though 32 degrees locked msd hei running 93 octane no gold 602 is straight from gm brand new

[dirty30]

bp gold

Fuel is bp gold 93