Gt 40 on a 94 GT?

depends on what kind of gt40 intake?

the FMS tube style with the elbow-yes

the fox cobra intake with just elbow- NO, more work is needed, along with swapping to fox t-body setup

94-95 cobra intake yes...direct swap no elbow needed

explorer with 5.0 with elbow-yes.

With all the stock strut tower brace will not work though.