I'm toying with the idea of sequential EFI from a 5.0 Mustang. Edelbrock has a very nice Pro Flo II unit, but $3200 is a lot.
The stock harness, sensors, computer, distributor, rails and parts of the fuel lines are capable of feeding a 400HP 302.
Other stock pieces would have to be replaced with 24-29lb injectors, 255lph fuel pump, 70mm throttle body, and 70mm MAF.
EFI intakes are expensive, and there are two of them, so maybe take a page from Edelbrock and get bungs installed on the 4V manifold? Also get a chip tune or Tweecer to correct calibration and fix the firing order.
Definitely longer and more difficult, but it might save the cost of new high performance upper and lower intakes, about $750 even on ebay. Maybe save another $500 by refurbishing the used parts... if they work from a junkyard.
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