Buddy the model before 1983 were called GS750 and there was no such thing like GSX 750 at that time... the models with 16 valve DOHC were known as the GSX series and the ones with SOHC 8 valves are the GS series... and many people confuse them...
By the way your CJ-5 is looking really cool to me... i heard it has a 6 cylinder 3000 CC petrol engine... ??? Can you tell me some details about it... as i also want to have some fun of 4x4 not now but in near future...