Interesting project Ted - the '55 police car. Head specs sure do get busy when considering all those variables - great info. I'll work on coming up with a definitive plan for the heads once they've been given a thorough inspection. Probably be pestering yunz again.
Yanked my block and heads from the local shop who was going to clean and magnaflux. After a month of "I'll get to it next week", and "just like a scruby" when I discussed details, I decided this was the wrong shop for any simple task on my hardware. Have to make a trip to Seatle monday so the goods will be going down to Gary at Pacific Auto Machine in Renton. I'm confident that with a good plan and good parts he can supply a worthy short block.
Great help guys... and great forum. Seldom is heard a discouraging word (rare on forums).
Thanks for your insight MercMark. I'll see you and your beautiful Merc Monday.
Bill C

Drag it home, figure it out.