Josh,
Use the aluminum gear on cam and steel on crank. That is the way the set comes.
There is a special straight toothed set that is steel on steel. Very noisy.

I have checked quite a few and found them to be accurate to the cam card, within 1/2 degree.

Been working on the head. Doing 3 right now. It is sitting in line ready to be ported on. All the other machine work is done.

Then deck it, perform valve job and assemble.

Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com