which intake? hyperpack or short clifford?

Trade for the HP intake, sell it, and buy an Offy. Much better intake for the street than either of your present choices.

You should seriously consider this option. You would be much happier in the end.

Also, If you haven't bought your cam yet, you may want to check out the Erson slant six cams. I don't have one, but it seems folks are very happy with them. I've read a few comments here and there about some problems with the comps having to do with the oiling passages (?)

http://www.slantsix.org/forum/viewtopic.php?t=21400&postdays=0&postorder=asc&start=255