72,91,92,96,99 Cadillac C-10 Pickup truck

[actconstruction]

I've been looking around the web, looking for information about rear wheel drive 4.9 L swaps, and only found some general information. So, here we go, I'm about to dig in, but first... Has anybody here ever used the 4.1/4.5/4.9 Cadillac motor in a rear wheel drive application? How did you make out? Here are the issues as I see them.
1) Bellhousing configuration. Looks close but no cigar for the SBC pattern.
2) Rear mount thermostat housing. No biggie, I'll just run it remote to the front or side somewhere.
3) Intake direction is wrong, but I think a one inch spacer and rotating the whole assembly will maintain air flow. I may supercharge, making this a moot point.
4) I need to be able to operate a 4L80e transmission using inputs from the 4.9. Not sure about this part yet
5) I need to delete the Body Control Module, climate control, and passlock system.
6) Oil filter assembly on back side overhanging bellhousing. I'll just run this remote with a bit of minor custom fab work.
7) Motor mounts for RWD configuration. I'm not sure about this, since the motor's not out yet and it's hard to see them. It doesn't look good, though

I'll start posting pictures when it really gets underway. I pulled the motor, transmission, etc. from my fresh 72 LWB (eventually shortbox) C10 AirCab project. I pull the motor and transmission tomorrow from the Caddy, which by the way, only has 20k original miles. It's the same old story, old lady bought a Caddy and wasn't really able to drive. This is not a line, I know personally that this Caddy is legit. It actually produces almost 300 HP and well over 350 ft/lbs torque with an extremely low power band that runs out around 4500 RPMs with a preset shift at 4000 under light load. Maybe I'll try to find a 6L transmission to take better advantage of the low power band, and try to work out a better gear ratio for the rear axle. One thing at a time, I guess. Any experience, advice, or kind words out there?