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I just measured a rear end I have laying around and its 57 inches from the hub face to hub face. I measured the distance from the outside edges of each brake backing plate, 54 inches. Then I measured the distance from the outside edge of the backing plate to the edge of axle flange, 1.5 inches. So 54 + (2*1.5) = 57 inches. This is an SA rearend but should be the same for 81-83 FB axles for sure. Not sure if the GSL or SE axles are any different.
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1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs
Project Fat Nikki Budget 12A rebuild Video setup < $30.00
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