use the Buick
Hell ya, do it. I have a '70 Buick skylark with a 455. A 455 Buick has awesome torque with pre-75 heads. I looked into this swap for my truck. For a stick you'll need a BOP bellhousing and a 455 only flywheel. If you're using an automatic I bet you could find a car transmission case and change the tailshaft. Other than that, the rest is just little stuff. You'll have to fab motor mounts, water pump outlet is on the same side as a chevy so you can use your radiator, the distributer is in the front, and Buicks are known for oiling problems. If you use the stock manifolds you should have plenty of clearance, but I don't think you'll have an other option but manifolds. Hope that helps. Kevin