So Ive been slowly plugging away at my engine work. Got the right bank head done and installed, left bank head is ready for mounting. Rear differential service is complete. New timing chain is on. Still have a long way to go. New exhaust, brake service, about 5 oil changes to flush the milkshake out, trans service, front diff, radiator, water pump, intake gaskets, timing cover gasket, distributor, plug wires, etc. Slowly but surely.

Anyway, my question is this: does anyone know the exact size and pitch of the crank pulley bolt in a 95 4.3 VIN W? I got a little over zealous with my removal tool and hurt the thread a little, now I have to re-tap.

Also, while I had the heads off, I took the time to index the spark plugs. Has anyone bothered with this and seen any gains? Pics are coming soon, need to get my USB camera connector back. Thanks for all the help!