Sorry for the delay guys. I had some other stuff I needed to do and I was waiting on the driveshaft.
First, I checked out whether or not the seal is different between 2 and 4 wheel drive. It appears to be. The 241 case I had bolted up takes an approximately 2 inch inside diameter seal, where the 2wd yoke takes one that is approximately 2 7/8.
I also had to modify the crossmember. To have the trans yoke in the right spot the mount needed to come rearward about 2 inches, and down 1.
So I cut out the offending area and reworked it.
And probably didn't need to, but braced it from underneath for insurance.