I put the 400 sb in mine when it still had the full front clip. I didnt have to do a body lift or anything special to it. I moved the rad to the back only for more space in the engine bay.
Believe it or not we made the stock tranny crossmember work as well. Fabbing the motor mounts yourself isnt a hard task. If you can weld and grind then you can do it.
The price list for mine has been bugger all.
Engine 400 small block.(was supposed to be a 350) cost me 6 beat up off road lights
Tranny turbo 350... we had 4 in running order laying around so free
208 case.... we had 3 laying around so free again.
driveshafts we built ourselves.
aluminum 3 core rad i stole from my bros wrote off mustang
so the only thing that really cost me any money was to buy the pipeing for the rear mounted rad and what ever small upgrades done to the engine, guages etc.
The one that I have posted in the for sale section is actually my bros truck. I agree with chunk on the 302's. That truck has pretty much the perfect ratios into it. Hes running 4.38s out of my toyota with 38.5 boggers. With that 5.0L in there he has aample power and tons to spare. thats the only ford v8 swap we've done and I gotta say it was a pain in the ass compared to the chev we put in mine.
These builds can be as expensive or as cheap as you want them to be. If you want to have everything brand new then its gonna cost you. But what I have done is take parts that may not be in perfect reliable running order and put them in. Then once the shitty motor, tranny, case etc is in you build good motor, tranny, case etc and put them in once there done. that way you can spread the cost out a bit and at least your up and running even if its not to the standards youd like. You can put in a lot of junkyard motors for the price of building a really nice one. to me its alright to have to change the motor out every now and again and put another shitty one back in. Because eventually I'm gonna have all my good stuff in there and then not have to worry about it. At least I've still been able to wheel, just a little more maintance and work when you have less reliable parts.
Good luck with what you do.