Standard response from me on the subject of going from a 350 to something older, think carefully. Do you really want to get out of what is a comfortable, solid and well put together decent car into something that rattles and creaks, requires fettling to keep going, old wiring thats giving up the ghost, noisy etc etc Just be aware as Doc says, its an old car that may not seem so great once the novelty has worn off.
Having said all that, its not like you cant change your mind if its an itch you have to scratch.