I originaly was going to go with a 6al but then I was hearing people say that it would help out but the stock was more than fine..

my buddy has hondata 4b. which hondata would I need for him to tune my ecu for me. The setup is going into a 89si but I am converting it to obd1. Unless I can leave it obd0 and still tune it with the hondata, also will he be able to tune my ecu if his hondata has the boost option or does it not matter (only an extra option) but if I leave it obd0what ecu do I go with or can the original 89si ecu work in conjunction to the hondata?