Recommendations for street blower...

[RED92LX50]

Unless you are buying used parts, or getting some other fantastic deal, I don't see how you can do the whole heads/cam/intake/tb, etc. for anywhere near $2500. To me it looks more like $4000 (while an A-Trim with bypass valve, new fuel pump, and adj fpr will run you around $2000 total) - and probably be a much easier install:

SysteMAX II Requirements $2000
(Emissions legal CAM)

Ford 1986-93 5.0L H.O. EFI V-8 engine equipped as follows:
70mm Mass Air Flow Meter $225
24 or 30 lb./hr. Fuel Injectors $225
65 mm or larger EGR Spacer $100
65 mm or larger Throttle Body $200
190 lb./hr. Fuel Pump $125
1.6:1 SVO Roller Rocker Arms $225
Late Model Valve Covers $125
Adj. Fuel Pressure Regulator $100
1-5/8" Headers $300
X-Pipe $400
Misc, Gaskets, Champion RN14YC Plugs $200

Total $2000
+ $2225
-----
$4225


A set of 1-5/8" tube headers, used in conjunction with high-flow/ low-back-pressure mufflers is definitely recommended. A 3.73 axle ratio, for either automatic or manual transmission vehicles, will allow you to take better advantage of the engine's higher RPM torque and horsepower.