35's and 36's Plymouths are my favorite years of that era ..although I applaud the fact that you would like to keep it original, trying to drive one on todays highways and traffic is downright scary ( atleast around here anyway) ..

Maybe do a resto-rod kind of thing to it, look original on outside but underneath use some modern touches, I've seen that theme pulled off successfully many times

Either way, its your car and its cool ..Good luck with the project