1964 Tempest And GTO Speedometer Gear Usage

1964 Pontiac Tempest & GTO Speedometer Gear Usage Chart (2 speed)
  Driven Gear or Gear & Sleeve Tire Size Speedometer Adapter  
Axle Ratio Part # Ratio Color 6.50 X 14 7.00 X 14 7.50 X 14 Model Ratio Part # Color Sleeve p/n
3.73 9775187 45:18 LT BLUE X X   777-S .8653 535617 BLUE 1362285
3.73 1362196 43:18 PURPLE     X 777-S .8653 535617 BLUE 1362285
3.55 1362196 43:18 PURPLE X X   777-S .8653 535617 BLUE 1362285
3.55 1362195 41:18 YELLOW     X 777-S .8653 535617 BLUE 1362285
3.36 1362195 41:18 YELLOW X X   777-S .8653 535617 BLUE 1362285
3.36 1359273 39:18 BROWN     X 777-S .8653 535617 BLUE 1362284
3.23 9775187 45:18 LT BLUE X X           1362285
3.23 1362196 43:18 PURPLE     X         1362285
3.08 1362196 43:18 PURPLE X X           1362285
3.08 1362195 41:18 YELLOW     X         1362285
2.93 1362195 41:18 YELLOW X X           1362285
2.93 1359273 39:18 BROWN     X         1362284
2.78 1359273 39:18 BROWN X X           1362284
2.78 1359271 37:18 RED     X         1362284
2.56 1359270 36:18 WHITE X X           1362284
2.56 9774413 34:18 LT GREEN     X         1362284
3.90 1359273 39:18 BROWN X X   777-S .8653 535617 BLUE 1362284
3.90 1359273 38:18 BROWN     X 777-S .8653 535617 BLUE 1362284
Information supplied by George Pearson, taken from a Pontiac Parts Book