Do not scrap a 70 engine or trans they will sell for a lot more money than you realize. Also a sure lock is a powere lower lock, unless it's a sure grip, then it would be the clutch type. even with the 276 gear, you can get close to 400 just for that. The big rear brakes are also sought out for with drums and an easy 100 bucks. If you got the money and the engine isn't cracked, then I think it's a good deal. If you can talk him down a bit, even better.