air injection ports

[737jetdr]

Whats the most common way to plug the air injection ports on the smog 318 heads? I saw a thread on here once that listed sizes of plugs and such but cant seem to locate it. Thanks

 

[rumblefish360]

Drill and tap a 1/4 X 20 allen stud.

LOL, I've seen tin foil stuffed in there and JB Weld, both also worked.

 

[Prine]

The holes are .25", I drilled the first .375" deep out to .31 (5/16) and welded them up....then grinded the weld back flush!..talk about cheap, and fast.