kryan9

Can someone tell me what these are and what they do? I noticed my later model (85) block doesn't have them. Also can I run an FB Racing Beat header on this SA block which looks like will cover up the holes?

DivinDriver

iTrader: (15)

Secondary air injection ports; part of the emissions system when using Thermal Reactor exhaust. Must be a pre-81 engine?

It's OK if the header blocks them, just be sure to use blocking plates for the ACV and Heat Exchanger ports on the intake manifold, too.

Qingdao

iTrader: (3)

The header blocks the holes up. I'm running the same 12A engine with an RB header in my car now.

kryan9

Should I use the SA header gasket or the FB one?

DivinDriver

iTrader: (15)

Won't really matter much since the header plate blocks off the other side of the hole. The FB one is probably cheaper or easier to find. Just make sure it's for a 12A.

kryan9

Thanks for the help.

Qingdao

iTrader: (3)

I don't have any of the factory stuff. The car I bought came with the 12A and the RB street header and RB gasket.


Well the car came with a blown up 13B but thats beside the point.