First off, you need to determine if you have adjustable rocker arms, as cindys sn95 pointed out some 302's do not have adjustable rockers (this will have the rocker arm fulcrum extend down to the pedestal in the head) and are torqued to spec, if you have the adjustable type which the fulcrum is round and has a convex side (half rounded) on the bottom, this type has a locking nut for the adjustment (they should not be able to be turned with your fingers) they look like the top is crimped in a little. If you have the non-adjustable type, then torque them to spec, if you still have noise, then try an additive to free up lifters, the other possibility would be worn out pushrods, rocker arms, valves, camshaft and lifters since the oils today do not have the zinc additives, and another possibility would be low oil pressure which might be too thin of oil, or too much clearance on the main and rod bearings (too many miles). My 2 cts. Good Luck.
Last edited by rex1965; 08-15-2012 at 09:53 AM.
Reason: more info