Quick question bout making a slant quick......

Hum $1000 budget.... You will be hard pressed to be happy with anything for that kind of money. A V8 swap even if you were given the motor will be more than that as you must change almost everything under the hood including the radiator, trans, power steering (if so Equipped), K member, wiring,etc.
I would think you could get close for $2500 if you can do a lot of the work your self. Good thing is you can continue to drive the slant most of the time through the build.
Frank