Sorry to hear about your leak Tex. Those rear main seals can be a real pain.... I have had NO LEAKS in at least the past 6 or 7 builds by scribing a line across the bottom of the retainer to the pan rails with the crank out making sure the seal ends are dead nuts on as stated earlier in this thread.

Dwayne ,
i have a couple of minor issues as you may have noticed - rear seal and intake oil leaks .
I ground a 4mm aluminium plate up and that has solved the intake leak also ground off the nubs on the intake lower edge .
Initial thoughts on my motor is good . BUT with the 5000 stall it is a little hard to feel how good at lower , less than 3000 , rpm . Only pulled it a couple of times past 3000 . In this way it is like the old motor real easy until just over 3000 then all hell breaks loose .
Idle is good , around 1050 in neutral 850 in gear . Starts good . Does sound a little different , i used Dougs D452 headers this time into the old 3"exhaust with aerochambers .
I was having a few issues with carb settings , same ProSystems carb . Though going a lot smaller on idle air bleeds is helping plus simply running it . Patrick said to go down to 063 plus up jets 2 sizes
Still have to play with timing , 20deg initial plus 14 in by 2300 at the moment
I hope to run on a chassis dyno this or more likely next week .
If you have any thoughts re tune guidance dont be a stranger LOL

Tex

You must have more restrain than I do......if I had driven it 30 miles..... My foot would have found the floor at least once

hahaha , its too expensive down here building mopars to take any chances .
And Mr Plod is always on your case .
Race day in 6 weeks

Tex

I did have to clearance the retainer to the rear cap and studs a bit. I just hope it doesnt leak.