Yes gear ratios are the same I am pretty sure. No pump rub issues and it's just huge compared to the 263, looks like a drop box hanging under there. Ill get some pictures of it. Also able to clock it down for better front driveshaft angles. 1480 u joint rear slip yoke shaft and a 1410 front slip yoke shaft so I've got a pretty strong drivetrain just need to get some new rear axles soon probably. There is a little work required to make them work on a chevy, wfoconcepts modifies them to work and they are ready to bolt in.