1966 Dodge Dart Restomod

I should have said this first, where as the body is a 66, the donor car was a 65, providing things like the steering column, transmission, floor shifter, etc.
The rear end is an early 70s 8 3/4 with 355 gears, so the rear rims are 5 on 4 1/2, while the front remain 5 on 4.
The engine is a 360 from the 70s, I need to look up the block code and find out from what.