A piece of 2" square tubing and a welder should make short work of fabricating a center-mount motor support, and another one to hold up the back of the transmission should get the mounting problems solved. That makes the type of bellhousing you use a moot point. I believe there's a 12" clutch available for the 366 engine, providing you have the right flywheel for it. It adds quite a bit of extra swept area and pulling power over the 11".
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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