Getting ready to swap a 5.7 into my 73 Dart Swinger

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Hi all, I'm very new to the site, but wanted to rack as many brains as possible for some advice with this. I yanked out my old worn out 318 3 years ago and waited for a good deal that i could get the whole package from one car. I was able to get a 5.7 and the auto trans out of a 2013 Challenger with 23k miles. The guy also gave me the shifter, driveline, wiring harness, ECU, and gauge cluster from the car. I have ordered my new midsump pan, p/u tube, and gasket, along with the TTI motor mounts, oil filter block plate, and the oil filter relocation kit as well.

My questions are:

1) After I get the oil pan swapped, the filter relocation all set up and the motor mounts installed, everything should be ready for it to at least drop into place right?

2) I've read that the transmission should clear with either beating the floor pan with a hammer or cutting into it (I'm hoping I don't have to cut it, but will if I have to). Any other knowledge on this?

3) I'm keeping the stock front end with torsion bars. For now. Which will probably last another 15-20 years before I'm able to swap in the kit from Hotchkis or RMS. I'm keeping the stock manifolds on the motor, but from what I've seen so far, they should work with either suspension set up?

4) I'm sure I've forgot a few things, but just wanted to get the ball rolling to see what I've got myself into. Thanks in advance!