Whipple Supercharged Gen3-426 Stroker-1967 Barracuda Swap
A G3 isn't a bolt in deal in some ways. Trouble spots I can think of is the firewall and inner fenders.
I don't know if that SC has a manifold on the back of it like the Hellcat one, but if it does and you try and put it in the stock location (front to back) you might need to notch the firewall to clear it. Based on what I can see, shouldn't be an issue as it looks like the intercooler lines plumb into the front left corner. But the SC might still crash with the wiper motor mount and the wiper motor itself either way.
Those valve covers might require the top of the inner fender at the shock on the passenger side to be modified as well. My brother is doing a 6.4 into a '71 Demon swap and used the Holley fabricated VC's and couldn't get them to work without a mod there.
Power steering will be an issue if you don't have a Borgeson box, the stock PS box is a no-go with all the swap headers I am aware of.
Not sure your oil pan works with the TTI swap headers either. Just a guess, something else to look into.
The AC compressor you are running won't work with anything except the Holley system and those require the '73+ spool mount v8 k-frame that move the motor forward 1.75". You can swap to the Holley FEAD kit but I think it is $3K or more.
You will also need to notch your PS frame rail flange with the alternator you are showing. All it takes (generally) is to remove the flange and re-weld it, but if your engine compartment is painted, it might not be something you want to do.
Does the car have EFI already? If it isn't already then plan on a fuel system.
Not saying it wouldn't be worth doing, just don't want you think it is as simple as pulling one motor and bolting the other in.