Not a bunch. Know a guy who ran a set( after a ton of work by Ryan on them) and i thought they were underperformers. Not much if any better than well done eddies as far as results go.
Last set of heads i would invest in.
I have been emailing him about those. But decided I would be ahead to get IMM ported and set up EQs for 1600.00 vs about 3k or more to get them ported/valves/springs/rocker gear etc...
And that’s top dollar. There’s just to much out there to consider these yards for anything but cheap. They will port to 300 cfm. But not at the original asking price! Bare or assembled.
I’d pay less than Edelbrock Head for these by a fair margin.