I haven't talked to or bought anything from Clifford in a number of years, but I have used their intakes and headers. However, I did NOT use one of their cams. In most of the old Clifford ads and catalogs from back in the '70's, '80's, and '90's, some of their claims seem a bit, umm, shall we say, overstated. I would tend to trust your cam grinder more than I would a salesman at Clifford, but that's just my opinion, not hard fact. I've never played with a 261, so I don't know about the intake valve thing, but I'm sure some of the guys running 235's and 261's can come up with the answer on that.
