A little bit bigger cam with a modern grind, combined with some time spent gasket matching the intake and exhaust along with smoothing the bowls and a high quality valve job would be money and time will-spent, block the heat crossover and toss a set of Summit headers. If there is a ridge in the cylinder, bore it and have it honed to the next size. More money, but how many times are you gong to rebuild this? A fully rebuilt motor may cost a bit more initially, but its a lot cheaper than a new car payment for 5 to 7 years.
