New to the forum. I've owned my 86 250 for 3 years. Previous owner, a racer, built the 460 engine with a moderate performance cam & put a timing gear set in it. The idler gear arms that hold them against the cam & crankshaft gears broke. Broke a chunk out of the cover too. Long story short, can I go back to the chain? The cam & crank gears I compared them to at the parts store to the gear set are noticably smaller. Is the another solution you can suggest?