Chevrolet Repair: Identify 1227747 ecm chip, chevy astro, gm dealer

Question
I have a chevy astro that has a tbi 350, 3 speed hd 350 transmission (vacuum modulated), 3:73 rear end gear ratio. The ecm says 1227747 ACSU. What is this ecm out of is there a better one? And does a limited slip out of a awd astro have better gear ratio.

Answer
Hi Lance... you can buy performance chips from a good speed shop,they have a program where you can enter your truck info and it will suggest a better chip... as far as a rear end out of an awd astro goes it would depend on the ratio... calling your local GM dealer with the Vin # will get you that info from the truck you are thinking of taking gears from...hope this helps