I'm currently trying to get a pair of them was wondering if anyone has used them before. the set that I'm trying to get have 1.94 intake valves and 1.60 exaust valves, and are set up for studs and guide plates.
(update)
I just won the bid on E-bay for them today! To correct a previous statement, their a '69 set. They have had some extensive porting done and I'll assume they have hardened valve seats. They'll make a 10.1 compression ratio with flat tops. Final price:$252.00 with shipping.