904 AMC gearset swap.....

if you dropping your rear gears to 2.94 or less, the low or wide ratio planetarys will definaly help you out. the stockers are 245:1 for first and 145:1 for second. the wide ratio is 274 and 154. all a-500 and 518 are electrical to some point. its just the '96 and newer you want to avoid.