Sorry,Maybe little off topic. I’m sure if I do enough research I could see the difference in the E heads. I seem to think there may be three or four generations in at this point ? Can anybody educate me on the differences between the three Please. I know one was to help oil return the pan I don’t know the rest of the differences is there a fault in any of the designs that I should not use any longer? I do have an early set of Butler 370 wide ports. not sure if I should retire them? Motor is apart for fresh in up. But look good.
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