As far as halfshaft angles, I used to worry about that too. Until Don & Bobby Byars of PreProformance started adapting 512 Ford big-blocks to Panteras. Basically, they shove the whole powertrain back more than 3" on custom motor & tranny mounts. Sounds deadly but Bobby drove a customer car to 'Vegas two different years and open-tracked the beast both times, with no u-joint or other problems. Can't argue with what works.. thats a huge lump in a Pantera but the firewall bulge is stock. Actually, a stock Pantera halfshaft runs at a slight compound angle anyway, after I got around to checking.
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