Couple more updates. Scott said it will probably take them most of today to get everything back together back together and sealed up. Scott is very knowledgeable on the rear main seal issues and said they are pretty common. He replaced the aftermarket Mancini Racing (MRE-223) billet main cap on the engine with a stock style and fel pro 2947 rear main seal. (said they have the best luck with this combo) Keeping my fingers crossed that this does the trick.
On a side note, I learned something about big block mopar cooling from Scott this morning that I didn't know. I am using a mopar aluminum housing with an electric water pump. Scott to a look inside the thermostat housing and said that I didn't have the bypass plugged. Never heard of this before (maybe this is common knowledge) but apparently there is a small bypass port inside the housing where the thermostat mounts. Scott said block this (tap and plug it) will increase cooling as it will force the coolant into the block. (He is going to do it my engine while it is there) Just thought this was interesting and makes me wonder if this could have been leading to the cooling issues on my dad's motor that we fought for a number of months when we first got his car on the road as he is running the same housing but with a high flow mechanical pump.