what went wrong

Having spent 4-1/2 hours removing and 1 hour replacing a leaking split seal
on the front of my flanged crankshaft C-85 , my first flight today still
shows leakage....

Never really doing those old Chevy two part split seals well, I guess I'm
still inept G.

I think I'll be able to better the aforementioned time durations but would
appreciate any hints at doing a better job this time.

Thanks, Dick