Thanks for the compliments!
The cranks are old Campy Nuovo Records I had in my parts bin. I used the truvativ BB converter and it worked great. I did run into a very slight clearance problem between the chainstays and crankarm, I had to slightly grind the very bottom back edge of the crankarm to get enough clearance. The Felt cruiser frame is really wide at the chainstays.
Hated to do that to an old campy crankset but it sat in a box for over 20yrs and probably be never used again, so what the heck. Could have also used a wider bottom bracket but that would probably put the chainline way out.