I have a xspower manifold for a 2j and I know a hole or 2 has to be enlarged. Any ideas on which ones? thanks I think I have seen a post on this back in the day but damn that search button!!!!
The holes for the head studs need to be opened up a bit. Fit it up and you will find that usually 2 - 3 holes need need to be opened up. best to have a little extra clearance rather than a snug fit.