I have never heard of different series like that
I have heard like 1/2" belt is an "a" section
5/8" is "B" section but that just tells you how much to add onto size.
Far as I know a 1/2" belt is 1/2" belt ??
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1968 LeMans Convertible - 462 w hydo roller comp cam forged flat tops- 6x-4 heads- performer intake - 800 cfm QJ- edelbrock 110 gph mech fuel pump- 4 row copper rad- followed by a Th400 w/2300rpm stall then a nodular 10 bolt posi w 3:90 gears ( need 3:55 bad
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