I've got an '85 Camaro in the garage right now gettin one of those.... This is a fairly well built engine, did 435 hp on the engine dyno, and is allegedly going to do mid 20's on fuel mileage.... The entire package, engine, transmission, computer, and harness with a 12/12 warranty was around $7K....

If you can find a complete takeout without the harness at a decent price, Painless does sell a harness and 'puter for them.... Seems they're in the $2,000-$3,500 range around here too depending on which engine it is and the mileage.....