I think if you have spool type big block mounts, your in business. Headers are according to what you want to spend. Of course, you'll need the big block tranny and radiator. Car oil pan/pick up tube. Will have to shorten the drive shaft or get a different one if going from a 904 to a 727. I would think you could get things going for 600.00 or less, means you have the motor and know what it is. If you bought second hand pieces, you could shave a lot of that 600 down......