4 Cyl. project mustang

[loco_nid]

Alright, I'm looking into buying a mustang just to waste my time on (and money). This will be my first project car. I have a couple of friends that will do the work I can't do for fairly cheap.
I'm thinking I can find a 4 banger fairly cheap. So now I need some advise from the pros. What size engine would you guys suggest? 351? I can grab one out of a local junk yard right? What type of vehicle should I get it out of?
I know these are a lot of newbie questions, but I do appreciate whatever help I get.

[84LX89GT]

a 351 windsor engine is probably one of the easier swaps with good results from the increased displacement and swap components. a 4 cyl. mustang is a good way to start since they are plentiful and cheap, if you want something more more rigid and lighter a notchback mustang (with trunk) is great for drag racing and the frame twists less than a hatch, a convertible is not the best choice for a drag car, but is great to cruise around in the sun with although the chassis would need to be beefed up especially with more horsepower.
I'm putting a 400 modified in my '85 LX, which is a weird and harder swap, although so far it's been VERY cheap - but i don't have it all together yet.
Another fun project is a 460 into a mustang, although easier than a 400 351m, it can be cheap if done correctly.
Finding used 302 engines is another option since they are readily available and stock parts can be used for a swap.
Have fun!

[Mr.Mustang302]

Yeah the 5.0 is fairly easy to find. Hell, I have an extra one right now. They one in my stang was bought for $500. Good, low-mileage motor cheap. Just like 84lx89gt said, parts a aplenty.