340 Six Pack Engine Specs

They are very friendly to deal with from what I've read, as toolmanmike said, they may already have a grind that is a near match to that cam. A Comp 270 Magnum is
probably the closest single pattern cam, and they show a nostalgia repro of the 268/276 cam# 20-309-4, but the footnote says You cannot use the OE valve springs. Lift
is listed at .470 for the Mag & .464 for the repro, they spec their 901 springs, pretty close to the red 340 H.P. springs w/damper.