Wow, lots of questions!
OK. Here's the deal..
TTI will be producing the engine mounts and the headers for this swap. The mounts and headers will be available for A, B & E bodies. TTI told me last week that these items should be available by the end of June. I saw the A-body Hemi display that TTI had at the Mopar Spring Fling show in LA, in April. They actually had a 5.7 Hemi mounted on a A-body subframe on display. I put the picture below. The mounts and headers appear to work great on their display.
As I said earlier, manual steering is required to clear the headers for the A-body swap.
I will be using the 904 transmission that I currently have in the car. The new Hemi bolts up to the old and new transmissions. What I don't know yet is what flexplate to use.
The oil pan will have to be changed. You can see in the TTI display picture that they used a pan from Charlie's Oil Pans.
As far as the car is concerned, I will leave it as is to start with until I get the drivetrain sorted out. I plan on changing the car to a Dart GTS. The car originally had a slant6 and was light green with a green interior. I'm planning on re-doing it in Silver with a Red interior and a Red bumblebee stripe on the rear. Might also add the custom aluminum gauge bezel with modern gauges. The car will look stock except for the engine, dash and wheels. Will probably use the Torquethrust II wheels (17x7, 17x8).
Just putting the engine in with the headers, cold air intake and not having any catalytic converters, this engine will probably be close to 400hp in stock form. With the aluminum heads and all the aluminum bolt-on stuff on front of engine, I imagine the engine weighs less than a small block.
As far as the Mopar crate engine questions, I don't know much. I don't think anything is available seperately yet. You have to buy the whole crate engine package.
My current 360 engine is already spoken for. Sorry guys!
Stay tuned!!
MoparMan
(Bob)