Hello guys, been lurking here for years and learned so much about FE's.  I built a 445 stoker based on all the great builds shared on this site with the intention to install it in my 69 Rcode Mach 1.  but, I have sold the car and now my hot engine is all dressed up and no where to go.  I live in Colo Springs Co. and I am not building any new projects, so it needs to go.  See my local craigslist ad here:
https://cosprings.craigslist.org/pts/d/cascade-mustang-cougar-445-fe-stroker/7737544857.html 
Stew

Hey guys, I sold my 69 R code and never got these installed and I out of the old car business.

Here is my local Craigslist ad:
https://cosprings.craigslist.org/pts/d/cascade-mustang-traction-bars/7669354139.html

Hey guys, have been lurking here for years and finally completed my 445 stroker recently.  Hooked it up on my buddy's engine run in stand and after about 30 min of run time, started getting a drip in the rear main area.  About a quarter size.  My question is, what is the most common failure, the round journal seal or the the side "slots"?  My machine shop followed the collective technique of this site for rear main seals.  He has a lot of Ford experience and was puzzled we had a leak.  I didn't think to check the oil pan bolts (Canton T pan) until we took it off the stand and heck I snugged them down another 1/4 turn.  Seems like I don't tighten things tight enough sometimes.  Of course without it running it doesn't leak.  Is it pressure pushing the oil out in that area, or just lots of splashing around and oil return from the heads? I don't want to tear down a well sealed up engine if it was just a loose pan.  It has a standard 428 CJ intake and we had the stock pcv system hooked up.  It is also a Scat crank, so don't know if the "knurling" in the rear main area is present.  Jay mentioned that there can be significant crankcase pressure buildup that can sometime contribute to this.  On my old 65 289 project, we ran the stock venting system of breathers for years with no problems, but when I stepped up to a 347 stroker, we were always pushing oil out of the breathers.  I intend to put the engine on a dyno stand soon, and will watch for trouble then.  Whaddayu think?