need some help here

I would ask myself this...am I ready to pull the engine out of a running car? And can I replace what sounds like a good running engine for what I'm getting? For $600, no way!!

If you're ready to drop something else in and go, then yes, $600 is a pretty good price for a running drivetrain, even if its a 273!

Your call, but I do t personally like to go without a bird in hand!! Geof