I was wondering if anyone could give me a price range on a few mustang parts at a junkyard (can be your local junkyard, I just want somewhat of a price range to see what im looking at spending for the parts.)

87-93 Hood
302 V8 engine
T5 Tranny

I know prices will vary depending on junkyard -- but I just want a guestimate

 

Give www.car-part.com a shot... Salvage yard search essentially.

Here's a couple screenshots (better than copy-paste).
http://tinypic.com/b4xhqc.jpg (hood)
http://tinypic.com/b4xhxc.jpg (transmission, I'm guessing the 5.0's had the T5 transmission)

You'll be better off searching there for the engine, it will give you a good idea of the price compared to the miles and whatnot, those are the low end prices (it sorts by price, highest price first, so I scrolled down a little).

 

87-93 Hood---------------------50-100 bucks
302 V8 engine----------------300-500 depending on mileage
T5 Tranny---------------------Same at 300-500 depending on quality/Mileage of the tranny