[jthorn9]

Just be warned, there are a lot of parts needed to swap from the 2.3L to the 5.0 aside from the basic drivetrain and wiring harness.

Well the stock T-5 isn't the greatest, so if you can afford a better transmission, I'd do just that, get a better transmission. The top trannies are the TKO 500/600, T-56 (5.0 version), and the World Class T-5 (a little stronger than the regular T-5). If the tranny is an auto, can it, it's going to kill your power.

Best places to sell parts are:
ebay
mustangforums.com
corral.net
paper

These sites (aside from a paper entry) are very high traffic, especially corral.net which specializes in mustang classifieds, and will yield the best odds of you selling your parts.

Also, while you're doing the swap, build up the 5.0, it won't cost too much to do, and will make you grin nicely when you're done. Also, spend a few extra bucks and pop off the oil pan, pull the internals, hone the block, and put new bearings and rings in the motor, this will ensure an extra long life with the motor.

If you're looking for an economy build get the following parts (won't make the best power, but is fairly cheap)

GT-40 upper/lower intake
GT-40 Heads or GT-40P Heads (better performance), or GT-40 X303 Heads (best performance)
Cam swap is optional, if you want the car to be a DD, get a Steeda #18 cam or stay stock.
New 1.7 roller rockers
New Springs (if the heads are bare)
New Ford Racing Hardened Push Rods (very strong and durable)
Of course, all new gaskets
24lb fuel injectors (will support the extra power)
Pro-M maf calibrated to your injector size

With this set up you'll take that 5.0 from a meager 170 rwhp to well over 250 depending on head setup, cam selection, etc.