Yes, ClassicsR4Me, most likely many car owners have gone through what you are referring-to regarding your car.

It is my understanding that the car frame was a little different from the truck's frame?

My guess is that the front motor mounting details might be different?
The location of the water pump might need to be considered?
The fan blade and fan belt grooves will need to be considered?

Maybe some members here have experience with your situation?
3B: " . . . my suggestion would be to find a car front block plate and install that on your engine, . . . "

"You might get more responses from an old chevy car website?"

You might want to post the Engine Serial Number for your 235 engine. 235s engines changed over the years (with different changes in car and truck 235s).