I haven't gone out in the cold build sheet hunting yet...
I attached several L78 tach pictures, they are very well restored cars and all look to have the same center as yours.
Ryan
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1969 Beaumont 350 Auto White Sold
1969 Beaumont 307 Auto Green Sold
1969 Chevelle SS 396-L35 Auto Blue Sold
1969 Oldsmobile Cutlass 'S' Sports Coupe W31