Is your TBI a dual post model?(two rods and nuts on top of the TBI) If so, you may have a hard time finding one. If anyone has them, SUmmit and Jegs probably would though.
As far as the size, it all depends on the type of wheeling you do. I get in the mud alot and I prefer closed/factory air cleaners. Then I just drop in a good air filter element. If you dont run into any problems with overall diameter clearance, I would go with a normal 14"(not sure what size came on your TBI) and as far as element height, I think the taller ones look cooler, but that is my persoanl preference.
Just my .02 cents
Mike
82 GMC Jimmy "Emmett" "Built for function, not for beauty!"
IN TOO DEEP Off-Road Club