http://www.restorationbattery.com/gmproducts.html#corvette-batteries
looking here it is saying it is a R89s for base 1971-1975 and R89w for heavy duty i think, given it was for the 454 engine....
another site that sells repro batteries, this one with a picture...
http://www.antiqueautobattery.com/batteries/gm/R89S.html
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StingrayJim
NCM Lifetime Member #1936
Stingray's '76���������������������������� StingrayJr's '78���������������������������Lil Red '94
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