It runs great. I just bought it and drove it 500 miles from San Francisco to Los Angeles (HWY 5) in hot weather.

So far I know its a later model 235 but it looks like the head & valve cover were changed at some point.

Is there any advantage/disadvantage to having the older head with the valve cover that is held down by 2 bolts? Should I consider "upgrading" it to the regular head with the 4 bolt cover?

Pros... Cons... Suggestions???