Slant 6 Aluminum Performance Head

I considered that approach, but the 2 main drawbacks are; (1)the added mass at the valves, &(2)if one of the valves should sieze, the bridge would turn into a 2:1 ratio 2nd-stage lever at the other end. Burying the retainer/keepers on the seal/guide. Not high RPM friendly, & not tolerant of an unexpected lean condition causing an exh valve or two to tighten in the guide(s). Not to mention variations in spring loads/surge that would result in unreliable lifts valve to valve. I like the idea & suggestion, & in the RPM realm the Cummins lives in, it's an effective approach....but an 8500 rpm 170? I do have ideas however, still workin them out. There are compromises to be sure, but it has to be capable & reliable, Slant Six reliable!

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