Lend me you ears

I'm probably going to catch some flak for this, but your valves sound like they need adjusting. The are noisy.

I've always adjusted mine [on different cars] using this method:
Run the engine till it is hot.
Drop idle speed.
Remove valve cover.
Mark all the intake valve retainers with bright paint.
Start engine.
Adjust the intakes --- .010 feeler slides easy --.012 doesn't ----Use a 3/8 x 7/16 12 point double box wrench [sears works well]. Point the wrench to the front of the car.
Adjust the exhaust --- .020 feeler slides easy -- .022 doesn't
Recheck the adjustment.
Valve cover on. Reset the idle speed, Road test.