If The 13B from the 1987 is different from the 13B in the 1991 How do you convert it and how much would cost me?

Josh

 

Yes there are differences and what do you mean convert it? Are you asking how do you stick a S4 (series 4, 86-88) motor into a S5 (89-92)? or visa versa?

 

Try to be more specific.

search the 2nd gen tech area. Many people have done this successfully.

you just have to know which parts to swap with the motor and which to use from the other version. There are some wires to splice and clips to connect...