brake booster

was about to move my booster over yesturday much the same as seth did with his 82. i put the yota booster in to check clearance and suprisingly the the truck laid out with the booster in the stock location,
just wondered is there a smaller compatable booster i can use just to add a few more mms of clearance.
thanks

if you have 5spd you use a auto booster it is smaller in diameter

Os there a difference between the 4x4 and the 2wd boosters?