I know that this thread might be a little old, but I though that I would add my two cents. I think that a wisely spent 1K would be on preparing the car for the 350 that this guy wants. Like it has been suggested for exhaust and a rear end. Wait untill you can do it right with a real motor or make that 268 into a 350 your self to put the money into the motor. Oh and also get permission from the warden.