In the 50+ years I have owned and "piddled with" and driven my truck, I have never had the head off and do not know if the cylinders have been altered etc. However, if I can see it-I have probably messed with it. carb, coil, distributor, water pumps, fuel pumps, radiator, etc. Like I have confessed, I am but an aging piddler. Thank you, for your reply, Brad
