You need to watch for a few things though.
1. the fox gt40 uppers have the EGR built into them, the elbow will not work and you have to run a fox t-body setup.
2. Some of the exploder intakes are NON-internal EGR and external, that is really fine if you keep the stock 94-95 t-body setup as our cars are external, if you go to a fox t-body swap and want to keep your EGR (foxes are internal) you will have to make sure you have an internal exploder intake (early models 97 and older were internal IIRC)
3. The tube gt40 intake is not in production any more (again IIRC), but can be found used and will work with an elbow OR fox t-body swap.
They all flow +/- 5-10cfm or so from one another...I think its more production toll. and what one got picked for what test...one intake might have been on the low side of that production and the other style may have been at the other end of that toll.