indy "x" heads or edelbrock rpms?

crackedback said
I think the OP is talking about different X heads than the old mopar 894 casting.

No comparison between the Indy X heads and old mopar iron.

Thanks for clearing that up crackedback, is right I'm looking at the new castings from Indy.

I will be getting ahold of Brian at IMM for an order.

I had a best of 12.86 in the 1/4 when it was a 4 speed. With these changes is it too much to expect low 12?