Rear Main Oil Leak

[IMLost]

Well everyone my make over is complete and Sledge gets a gold star! It was tough but I took a c shaped cut out of the crossmember. My first atempt was 3" wide for the tail shaft. It was not quite enough. When I got the tranny up; there was not enough room to clear the shifter box when the imput could clear. I took it back out and made the notch wide enough for the shifter box to clear.
The drive shaft was fished over the rear end first, and when I got the tans in had less than 1/2 " to clear. ALL is good. The 2" cross member is still in tact and I intend to re support it with a 1 1/2" x 1 1/2 " L angle to cover the cut out.
This was a looong learning exercise but well worth it.
FYI my rear seal leak is still a mystery. My engin in fact had a 2 piece seal installed into a 1 piece block. my theory is that whover built it put the crank on a lathe and cut a groove after they found out they messed up. It was supposed to be built by TRi States in PA but they had no record of the car, neither does BDR.
Who knows the truth, and at this point I 'm the only one. And since it mine now and I know what I've got I guess i'm finally a Cobra owner.
At my house we used to part the car in the garage. Now I have a garage that we park the cars in.
Thanks to all for your thoughts, suggestions and help!