What would happen if I changed out my 87 LB9 auto chip for A 87 LB9 5 speed chip. Would it be close enough to run? Or is it way off? I have ran several but nothing came up. The reason I'm asking Is I just bought a ecm out of a 5 Speed car for back up.

 

My experience with (7747-TBI) was car did not run well at all. Stall was issue deaccelerating to a stop. I am manual and started with auto .bin. But your situation is opposite of mine. Did you check CraigMoates for availability of .bin?

 

Not yet planned on that on my next day off Wensday. thanks for your input.