Looking at images, the AC 76-S (image borrowed from the internet) appears to be just a little longer than the Champion W18. The Autolite 3076 is significantly shorter than even the W18.I am working on a Delco light plant. I see many plants, including mine, show use of AC plug 76-S. I can't seem to find a cross reference to either AC or Champion for this number? I realize most 7/8" plugs would work. Just wanting correct if possible. Thanks.