years ago I repaired two sets of heads that had the longer valves and screw in
studs installed, when the engine got past 4 grand the rockers arms broke due
to insorrect geometry...the bosses in the heads need to be milled down for the
screw in studs a the valve stems need tobe shorted, this done on a valve
refacing machine, it was to long ago to give measurements, but Ford hot
rodder macine shop should be able todo this their sleep, Clyde 382001173
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