360 now 408 stroker oil pan still leaks!!

Great point, this is often overlooked. I just had the same issue on my new little roller 318, changed the PCV valve, leak stopped.
If you run a HV oil pump, it even makes it more difficult on some of the sealing.
I may try that and see if that solves it. thanks .My next project car is a 69 rag top red with a white top: is yours a 68? Nice Car!