Hey J.Rob,
Yes I bought set of them in 2010 and did a little work with them off and on until 7 years ago (2015). 2.05/1.625 valves, 250 cfm @ .400, 304 cfm @ .600". We used them on a 424.5ci/360 at 10.9:1 compression with a 258/260 solid roller, .680"/.688", 110 LSA 107 ICL. 572 LB-FT @ 4,800 rpm and 629 HP @ 6400 rpm on 91 octane pump gas. I was asked what it would cost to do another set and it came out to $10,000. No takers.