Modern Drivetrain Swap into '65 Valiant
SRT4 motor will fit with plenty of room.
Great and useful photos. It looks like the SRT engine was designed for the engine bay. I have the same 2.4L DOHC engine in my 1996 Voyager short-wheelbase minivan, but no turbo. A strange choice for a minivan. It has almost the same power as the 3.3L V-6 but you have to let the engine spin to get it. It surprises people when I floor it and it starts pulling hard >4000 rpm. Chrysler's earlier 2.5L 4 cyl was actually based on the slant-six, basically 2 cyl chopped off so they used the same tooling to machine the block. In my engine, the alternator would be up high on the driver's side, and the AC compressor down low on driver's side where it would likely interfere with the steering gear. The SRT components fit better. I doubt the aluminum intake manifold on my engine would fit as it wraps up higher than the valve cover, but Neons and PT's had a different plastic intake manifold that might fit.
Where did you attach the motor mount brackets, as my block has none there? Is the left one the mount for the power-steering pump? Was there a RWD version of the 2.4L SRT?
It is hard to find an SRT engine, though PT Cruisers used them and fell out of favor so now hitting junkyards. You'd have to check row52 regularly and grab an SRT when they first show. The VIN should tell if an SRT.