GM used 3 different tailshaft lengths on the TH400 to --I believe-- mitigate the length of the driveshaft in different wheelbase cars. Yet some 'non-huge' wheelbase cars still got 2-piece DS (like the 119" WB Rivieras, I believe). I have a 123" wheelbase Buick and am set on using a long-tail TH400, since I already cut the bellhousing off for an UltraBell. Don't have any driveshaft yet- would be built for the car. A short tail TH400 is 9" shorter overall than a long tail. Is there any known caution/concern RE driveshaft length if I switched over to a short tail TH400? Is there a recommended max length? Just curious; short tails seem to be a lot more common.