2-727s rebuilding 1, question

I have never rebuilt a automatic transmission yet, but I have a 1979 727 with a lock up and a 68 727 both for small blocks. The kit I have is B&M part no 10229 for non lock up.
The one I will be using the 1968. is there any parts that are better or improved in the 79 lock up that will fit and improve the 68 transmission and is there a difference between the 2 besides the valve body and converter.