Hmm, I'd ask the previous owner if he has the cam card. If he/she doesn't have it, I would suggest [email protected]
inches and [email protected]
Use the method of adjusting a cylinder's valves the following way: remove the spark plugs, for easier turning by hand, watch the intake valve in its travel, when it starts to close, adjust the exhaust valve. Then, when turning engine, watch the exhaust valve. When it starts to open, adjust the intake. This method places the adjusting valve on its base circle of the cam lobe.
Intake=closing, adjust exhaust
Exhaust=opening, adjust intake
Adjust the other cylinders, any order, but firing order is good to follow. This method is for a SOLID lifter camshaft.
To determine solid lifter, turn engine over by hand to where pushrod just stops turning when rotating pushrod by hand. Wait a few minutes. Attempt to turn pushrod by hand. If it turns, it might be considered a hydraulic cam, lifter has bled down due to the spring pressure upon the lifter. If the push rod does not turn, then I would consider it to be a solid lifter camshaft.
If engine is equipped with a hydraulic camshaft, have engine at operating temp, turn the idle down as far as it can go without shutting off, cover the wheel wells and fenders with an old blanket/rags, remove valve covers, start at an end cylinder, loosen the locknut on the rocker arm and listen for clacking. When clacking, tighten the lock nut slowly to silence, then an additional 1/4-1/2 turn on the adjustment nut to preload the lifter. Tighten the valve adjustment if a locking device is used. Continue with the other cylinders using the same method. Restore engine back to its original configuration when done, i.e., idle & clean-up.
Good luck.......I was up in Waterloo a couple weeks ago, nice country, people included.