I noticed some unusual wear on the side of my '55 3100 valve cover, and it looks like I may have a '55 "Blue Flame" engine. See picture here:
Blue Flame Logo Were blue flame engines installed on manual transmissions? Was it an option? I have 3 on the tree, and I thought the engine was original. It is a '55 dated engine, but now I'm wondering if it was replaced with a passenger Blue Flame engine some time ago.
It's also possible that someone just applied a Blue Flame logo to the orginal Thriftmaster a long time ago. Aside from tearing apart the engine to check if it's got hydrolic lifters, is there any way to tell exactly which engine is installed?
Here are the casting numbers:
Block: 3837004 GM7, J215
Head: 3837161 GM1, J125
