79 Volare
Sorry to hear that.
The intake, oil pan, valve covers, etc. Do take awhile to tighten. You think a few are tight but then once all the others are tighten, the first few need to be tighten again. Takes 15-20 mins, if you go too fast, you can spilt the gasket.
Why would the oil pan leak ?? You got me there.
Sounds like its pulling the oil pan off, you might as well changed the oil pump and main seal.
Boy or boy, now I know why some people hate touching their motors.