92 4.3 Cpi computer reprogram for manual?
 

I have a 92 chevy blazer with a 4.3 Vortec and i want to put a Munice Sm 465 behind to put in a cj5:icon_steer: it but from what i can find the computer needs to be reprogrammed to forget the auto. Who can do this and about how much should it cost? Thanks