Ok, I *finally* dug up the buildsheet on my old F41 L78 Chevelle...I had 2 partials, but this is the only copy I can find, for now...anyway, it shows the F41 in box 107 (rpo's). Car was beautiful...Cortez silver with blue vinyl top, blue guts, L78/auto/4.10, 35k miles...sold out of Hasay Chevrolet out of Shickshinny, PA. Anyway, enough of my crying, looks like the F40/F41 difference is gonna be determined by Boxes 13 & 14 (FRT SPRING and REAR SPRING)...my F41 front spring appears to be "GB or G8".
