Originally Posted by UKDART
I have this cam with 1.6 on the inlet using PAC -1916 springs.

I ran that cam for years, with 1.5 rockers. Great flat tappet IMO.
150 lbs seat, 440 open is about right. That is a lot of pressure, so I used edm oiling lifters.
0.650"/0.630" MM305S

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1