Will a 77 Charger 360 fit in a 65 Valiant Slant Six Painlessly?

I might have everything you need to do an SBM transplant, including a low-compression 360/318 engine, the correct B&T 904, and a rear end, all cores.
Also have a KH disc brake system off a 67/8/9 Barracuda, or a set off a 73 Dart with the bigger bolt pattern. Could supply an 8.25 with the bigger bolt pattern as well. Or a narrowed 8.75 that came out of 70 Swinger, narrowed to fit into it's framerails. It was set up with 11" drums tho.
I have done that swap. And like said, the hardest part was the exhaust; for which I just installed Hooker Fenderwells. Today, we have better header options.
With a V-8 you really have to address the brakes, cuz you can be doing 60 mph in under 6 seconds. And it only takes 1 or 2 seconds to get crossed up. Those 9" brakes and 13" tires are borderline dangerous at 50 mph never mind top of Second gear.

The catch is this; I know that I have this stuff, but I have three storage places, so have no real idea where exactly it all is. and Therefore, it would take me a while to get it all gathered up and onto pallets.
Plus, you know, I'm like three or four days worth of shipping, away from you.
Well, I do know exactly where the drivetrain is, lol. Just not all the bits you are gonna need.
BTW
I also have A 340 Short, torn down and a set of 360 heads, with a cast-iron 4bbl and an AVS, plus a set of early exhaust manifolds, and all the bits to put it together. All rebuildable cores.
The one thing that I know I don't have is the V8 Centerlink, and not sure if I can scare up the right convertor........... but maybe, lol.
And if you like 273s, I got a torn-down core of one of those as well.
If Early A's have the same size T-bars as the 67 ups, then I got at least one set of every size Mopar made for those.
I even have a few 4-speed kits.
The rear spring-packs are different from slanty to V8 as well; IDK, I might have a set. Shocks, you'll want to buy new.

I'm almost yur one-stop shopping center