I have them, bought them used, 56cc version but had them decked slightly just to clean up. I wasn't confident they had the 8019 springs installed or the age so I replaced with PAC 1221 (and cups and retainers) from FTI when I had him do the cam.
When I put the current engine together the idea was (still is) to go turbo, so I got a dished piston -18cc setup for 18 degree heads. It makes a weird combo - the small chamber AFR with a dished piston, but Ed at FTI spec'd a .600" lift intake and exhaust at decent duration cam for me. And the compression is low by today's standards, around 9:1 but I'm don't mind being conservative running pump gas.
Rest of it is 4.125" bore 347, 3.25" stroke, TFS-R intake (non box). I have no idea besides internet calculators what it's making for whp. It ran 11.9 at 117 (slow 60') at 3310 lbs.