Pre 1945 Block Cams

[David Lien]

I Have 2 pre 59 AB blocks Numbers (D241. 4. X17) and, #(3223. X3). Both blocks have the round water hole in the middle of the block deck with odd shaped holes at the top and the bottom. Both blocks have 3 and 3/16 Bores one is +.060 and the other is a fresh bore at +.125. Both blocks came to me with a Cam marked 91 A. I have assembled the +.125 block with a reground Esky. 77 B cam that came out of a 1947 59 AB Block.

So How do I determine if my block was built with a 101.5 Degrees of separation (Pre 1945 Block) or if was built with 100 degrees of separation After 1945 Block ???

Also will an earlier block ((101.5 Degrees)) run OK with a 59 AB cam ((100Degrees)) installed.

Also are their any other funny things hooked up to my blocks, that I should know about????

I think I should talk to Pete, however with an entire flock of brains out their, I thought I would try the flock first. thanks up front I will appreciate All the help that I can get. David