Fast68plymouth, do you know what valve springs are used on the AeroHeads? I called yesterday and Russ was busy, but the lady on the phone said Pioneer G911? I looked and pioneer does not have a G911, but maybe it is the Pioneer S-1050? That is a 1.525"OD spring, lists 117-132@1.875", 341-369@1.375" That would be similar to a comp 911 spring, but with a higher spring rate? Or maybe they just use the Comp 911 spring and they told me the wrong vendor?
