Actually the Cobra and GT40 are different, they use the same lower But the Cobra is a cast
(po' boy $400 vs $650) version of the GT40 tube upper. The Explorer 5.0 intake can be used and is very simliar to the Cobra. Not drilled for a air temp sensor(no prob) and the egr system is different. They are usually easy to get fairly cheap at a salvage yard or ebay.
Mass air does not add any horsepower by itself, it is only necessary if you change the cam. Long duration cams don't have enough vacuum for the MAP sensor, so the stock speed densety system goes nuts. The firing order is different for the std 5.0( 15426378 ) vs the HO( 13726548 ) due to the cam. So it can't be used unless you do change to a HO/351 cam.
If you are on a budget the stock Mustang HO cam, 19lb injectors, shorty headers, etc. can be used with a '87 -'88 Mustang speed densety computer for approx 50-60hp increase(more if you change to the Mustang heads), no wiring changes are necessary.
I have Trick Flow heads and cam, 24lb injectors, 1 5/8" shorty headers and a full 2 1/2" exaust system. Tranny is a AOD from '90 3.8 Super Coupe with 2600 converter and Trans-Go shift kit. Rear is the stock 8.8 TC with 3.73 gears.(5.0 Birds have the 7.5 with 2.73 or 3.08 gears)
Except for some chassis parts, the basic rule of thumb is.... If it fits the Stang it usually works with little or no problem on a '83-'88 Bird or Cougar.
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1988 Turbo Coupe...5.0 Conversion
NA 13.11@105.32....W/90 Shot
12.23@112.19
<font size=-1>[ This Message was edited by: TurboCoupe50 on 11/3/02 3:27pm ]</font>