Jeremy Forsythe

I am looking at getting some performance heads to address the flow problem with L-83s. I am going to get a different Crossfire custom intake and probably some 2inch TBs or get mine bored and some 90lb injectors. Anyone have any suggestions/experience with new heads on an l-83?

vetteoz

There are many production SBC heads that are superior to the L83

84wannabezo6

that manning thing has got to go

Tom400CFI

What he said. Don't bore the TB's. They won't make any diff on a 350 motor.

Jeremy Forsythe

Don't I need a certain type for the crossfire intake to bolt up? Like one's a 12 bolt and one an 8? Which is mine?

Jeremy Forsythe

better?

vetteoz

Your heads are regular 6 intake bolt SBC heads , the same as any cast iron SBC heads from '55- '86 ,the Vette alum heads from L98's
and most aftermarket replacements

Vortec heads have only 4 bolts and require a special Vortec only intake which I don't believe you will find a CFI version of

Jeremy Forsythe

Thanks for the info sir. SO my best bet is some performance aluminum L98 head.

84wannabezo6

I replaced the 624 heads on my l83 with aluminum pieces from Edelbrock The original heads have 76cc chambers and the Edelbrock heads have 70cc so the compression will bump up a little depending on the head gasket used. I ended up using a victor .026 head gasket. These heads also allow valve lift of .575 nice springs and valves

Rohn

Changing heads might/generally does require a swap of ECU.