I measure the pan and its around 15" from the back of the pan to the front of the sump.
The Guy at Schumacher said he had not tried the 30761 but if the rear of the pan to the front sump clearance is 18 or less it will work in my 65 B Body with their Hemi conversion mounts.
I called Mancini and they pulled one for me so we will see this weekend.
I'll pick it up and try the install and will post results.
If it works out the pan and Pick up with a good Gasket is only $220.00 at Mancini.
Hopefully we will be back on the road this weekend.