I had the same problem, but found an inexpensive, clean, and super sturdy solution if your alternator is mounted on the LH side and you have accessory holes in the front of the head. Go to your local Chevy dealer and have them look up an alternator mounting bracket for a late 70's early 80's Corvette. There are two available, cast iron and aluminum. The aluminum piece is the trick way to go. You can tell the difference if you take a look at computer generated pictures; the earlier bracket (early 70's) that is made of cast iron has several protruding mounting bosses while the aluminum piece is smooth. Also get the adjustment brace (bending and drilling required to fit) and the belt guide. All of these pieces should run about $50. It can be polished, painted, or powercoated. On a scale of 1-10, it's a 9+.