For anyone interested...Plasti-kote has a universal gray engine enamel, No. 202. It looks fairly close to my original '52 engine color.
I'm not saying it's a perfect match or looking to stir the pot on this subject again. It's close enough for my engine, so I'm using it. I picked it up at Tractor Supply for about $4 a can.

Photo


Steve

'49 3800
'52 3600
'57 3100