360 Swap for the 65 Dart

I've done a little homework and parts grabbing over the years for this but man you guys are good!

Brakes are all new inside and out, still 10" drum but all good
New 1" torsion Bars
8-3/4 3.55 Sure grip, new or rebuilt from drum to drum waiting to go in
Transmission is rebuilt, maybe 10k on it.

I have a set of aftermarket motor mounts, and another set from abody Joe(?) I think.

Will 340 manifolds work on the 360? I have a couple sets here and had a set coated.

Trim the column for exhaust? eew? tell me more please.