Hey guys this is my first post here but I am a forum shark amd have read up quite a bit. Truck is a 92 c1500 ext cab that originally had a 350/700r4. Dropping in a 99 5.3/4l60e. From everywhere I have researched I seen that we need the 1" setback mounts to keep the motor in the correct position but whaddya know, its too far back by an inch! Wtf? Is there something im missing here? I guess i could move the crossmember back an inch to match, but will the driveshaft accept that big of a length difference? Any help appreciated