I know it's more work, but I would also pull the push rod cover and check the lifters and lifter valley for rust. I would also pull the rocker arm assemblies and clean the internals real good, rocker arm tubes, and all the rocker arms, push rods, etc. With that much rust, I would also pull the oil pan and check for rust in the pan and on the crankshaft towards the front of the engine. Then thoroughly clean.

Tim


"Pay attention to the details! It ALWAYS pays off."

1949 Chevrolet 3100 Series 1/2 ton Pickup
1964 Chevrolet C10 (Ol' Yella) (SOLD)
1958 Chevrolet Biscayne 2 door (SOLD)
1970 VW Beetle