5/64 rings really drag...
IMHO 30 lbs with no valve train is excessive..Poink the crank a couple of times to set the center main and see if it improves..
When I did Ifitsgotwheels 273, it turned with the valve train adj less than 30 lbs.It did have almost an extra 2 tenths piston to wall..
So much can cause drag...rear seal type..crank run out..main alignment ..cyl wall finish..oil ring type..compression rings..brg clearance..it goes on and on.
