Inliners International Forums General Discussion Blown and Injected Hacking together EFI on an Pontiac OHC Six

You could possibly also use smaller sized valve stems I am sure but you would need to install the correct sized guides. Same size the LS newer engines use.

They are metric sized stems, can't remember off hand what size they are, but they are smaller than 11/32"

Might want to look into that?

MBHD