I don't know if the cam gear is aluminum or not. I bought the car from a family member who owned it for about 3 years and drove it about 300 miles per year to shows only. I have owned it for 8 months and drove it about 2500 miles since purchase with only carb tuning problems. I just completed a compression check and all cylinders are between 135-145 psi (only one cylinder #6 is 135. All others are 140-145. I put the plugs back in and restarted. At minimum (850 rpm) idle it is normal and I do not hear the knock. As I add some throttle the knock starts..my guess is a rod knocking. Any way to further confirm this?
