Thanks for the comments, everyone. I think it's the gas cap as the weather here in Ohio was in the 50's all day so it probably wasn't due to heat expansion. It burped again when I opened the cap so I'll look into that issue.

~Denny
1953 Chevy 3100
w/1960 261 cid, 848 head | Weber 32/36 progressive 2 barrel carb. | Three on the tree & 3:55 torque tube | 12 V w/Gener-Nator & 6 V starter
In the Gallery Forum
1998 Chevy Suburban 350 ci awd/4wd