What Quantum has pictured in his reply is a "sheet metal" intake which takes place of the upper & lower.
A box upper is a rectangular box (usually cast aluminum), with a small neck & flange for the throttle body in the middle of one side. It takes place of the upper intake only.
Most will go mount on a GT40 style lower or truck lower.
One example is a Down's Ford upper. Unfortuantely, I don't think that they have a picture of one on their website.
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91 coupe
3.73's,long tubes,2 1/2" exh,ported stock t-body,ProM-77mm
cobra intake,edelbrock heads,B303,1.72 rr's
36lb inj's,tremec, & a Paxton NOVI 2000!!!
11.020 @128.95 on BFG Drag Radials (275/60/15)
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