I have to choose between a 1st gen 4 spd or a 2nd gen for use in a '97 4 door I'm building up and I'm trying to determine which to use. Are there ECU issues with the lock-up torque converter or anything else? Also, are there differences in the transfer cases? I will be running 31X10.50's so that means I'm keeping the 5.12:1 diffs. Just lookin' for the best combo.