Is there a difference in pumps between a regular TB and a TB EXT?? I am replacing my PS pump, and when i went to AutoZone (and while searching online), some pumps state "standard wheel base". AutoZone will look up my EXT LT and not have anything, but look up a regular LT and they have something. My Haynes manual doesn't point out any difference in pumps...only the difference between one on a I6 and one on a V8. I wish I knew if there is a difference....I am finding some decent deals online, but those deals state "standard wheel base"... Anyone know why? Thanks in advance!