355
3947040 iron heads 1.94 valves,mortec says this is a good perf. head,1968 327ci.
carter 600 cfm
edel. performer manifold
edel. rpm cam (I know :rolleyes: )
auto.
Currently Im using r44ts ac delco plugs at factory gap. Any other suggestions?
Thanks,Mitch

Forgot to say I have dish pistons , comp. is 9.4-1 , heads were cc'd at 62.

If that's a '68 date coded head, then I don't believe you should be using taper-seat plugs (the "T" in your code). With that compression on a 1968 dated head I would use an AC R45S.

Thanks Wooderson. graemlins/thumbsup.gif