Torsion bars won’t interchange. Driveshaft won’t fit, engine can’t be moved forward enough without oil pan/k frame interference. Radiator probably wider then opening in core support
I have seen many 383 early A’s over the years. It solves the distributor to firewall issue on pre 66 cars. All the ones I have seen had manifolds on them not sure of specifics on those. ECU is the same across the board for Mopar
You just need to drill or even knock out the plug in the two areas as needed. There is a baffle kit that installs on the underside to 3 raised post
From the cast valve cover instructions.
Discussion on correct grommets with photos...