[GOSFAST]

To answer many of the above posts about the washer availability, the O.P. wanted the washers to fit completely under the acorn nuts, the largest O.D. to fit that number is the size I posted in my original post, .675", anything larger will NOT go!

Thanks, Gary in N.Y.

P.S. ARP doesn't make them in the necessary size in stainless, only the "block-ox" ones. Their smallest O.D. for the stainless 7/16" washers is .812", these will not go with the acorns! They are also 120" thick. The ones we do have here for 7/16" bolts/studs with the correct O.D. (.675") come in either .062" or .120" thick.