I have an HEI in my 71 Chevelle and have been having some minor timing problems. I'm considering going to an aftermarket points distributor, but I'm not sure if that would be a good move. HEI's are popular, but I've been told that they were just a "GM smog device". My big block is knocking on 500 hp and I NEED hot, dependable spark. HEI or points. Compare and contrast. Thanks!