Recently finished up a total resto on my 65 320 drove it down the highway and could not believe it only does 50 mph, the J15 engine sounded like it was rev'n about 5000 rpm long story short 50 mph is max! I heard roadster rear end will bolt right in, is this true? and if it is what year and model will go into my L320? Brakes, drive shaft, E brake cable, shock mounts, diff width? Through me your opion and any information that could help me. I am thinking of buying a cheap broken down roadster that is trashed but before I do I need to know what year and model will fit my L320. 50 mph is just not going to cut it!