My rebuilt small block chevy has blue smoke on start up,runs fine.?
I agree with the above. Valve Guide seals. I'd think that if the rings werent seating, you'd get a lot of blow-by and the smoke wouldnt go away.
As for posting Chevy Small Block question on a Mopar A-bodies site. Here's the forum for you.
Chevy's A-Body Site ->
http://www.chevelles.com/