I'd like to know how they got 1.7" IH on a magnum head...there's not much material on the top of the head to machine the spring pocket, and I don't know of any +.1" retainers to work with the 8mm valves...

I'd probably buy or borrow a valve spring mic to check actual IH, but if they are set up to that 1.7" IH spec, they should be fine.


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