A 4.9 2 barrel car!? I forgot all about those. I think under 20% of the 79's had that motor.
As far as your question goes, are you looking to put in another Pontiac motor?
It would be the easiest, and you can order rebuilt ones for probably around $1200.
You must first decide which make motor that you want to use, because all of their motor mounts are different. Also alternator wiring, and transmission lines could be on the wrong side and need to be redone depending on which one you would like to go with.
A W72 Pontiac 400
Delta 88 would be pretty cool
