bad harmonic problems, valve train issues, no oil pumps available!!! only kits if you find a decent pump body after 40 years(alloy) camshaft end float, although fixed on later blocks,..rear main oil leaks, no seal available that is any good, the list goes on and on,,,and after spending heaps of your money , a six pack is really only around 300 hp...whats the point..anything more and the next round of probs start...
