a slant should be easy peasy to pull. I had mine out of my green 69 in like 25 mins.....of course there is no power steering or any power options at all.
I pulled engine and transmission together......pulled driveshaft, speedo cable, crossmember and put a jack on it....z-bar and shifter. throttle cable, exhaust pipe and the thingy that holds the exhaust to a starter bolt..........fuel line, wires from alt., coil and dizzy.......motor mount nuts, get rid of the radiator and fan and hoist it on out
you will probably have more work because I imagine by 75 yours probably has PS, and an auto with cooling lines that are probably messy.
They really made cars so simple in the late 60s ...not sure if that is a good thing or just Chrysler being cheap.