Originally Posted By jkwedge540
Anyone ever have a set of PSO B1's done by muscle motors? Do the y do there own port work?



I bought a set from MM.

I don't know who did the port work but heads were junk!!!!

Have Best Machine, Modern or Slawko do them.

Had to have major rework to make them usable.

Ran 1/2 hour and dropped a valve seat.
They used 3/8-16 helicoils for rocker pedestals and they pulled out.
I had to have 1/2-13 Tine Certs installed.
No heli coils for intake bolts, just threaded the heads.
No heli coils for headers, just threaded the heads.
Sloppy install of the pushrod tubes.
Had to have rocker pedestals cut .070 to correct geometry.
They were pretty much unusable as received.


PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....