I have a set of '73 heads with the 4 air injection holes on the intake mounting surface, and the B4B that I'm using does not cover them up. I'd like to plug them like TA says is required with the B4B. What are you guys using? 5/16 or so plug?
TA sells a kit, really cheap, to do just this. I included it in an order for other parts and used them.
I'm curious why you would rethread those holes in the heads rather than just get the right size plug to go in the holes? I've plugged AIR holes in many different engines and have always been able to find the right plugs.
Found these, I'll give em a shot. Thanks once again guys http://www.carburetor-parts.com/Aluminum-Expansion-Plug-516_p_2611.html