This evening i went for a ride beautiful night.On the way home i went up a 2 mile long hill about a 15 degree grade the engine started making pinging noises [tappits?].It got worse the further i went.As soon as i started down it quit and was fine the rest of the way home.[ no hills ]If i were to guess i think it was over heating. What do you guys think?I have never been up this long of a hill with it before.
My guess: Ignition is advanced too far. You can usually reduce it by downshifting but your timing is likely the problem. Check your book and retard it a bit by rotating the distributor. Pinging, if severe enough can lead to engine damage.