Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 3 Series - 8.875 in - GM 12-Bolt 49-0039-1 R010003YM Threads are 7/16"-14 x 1

Threads are 7/16"-14 x 1

All American 400 and any late model race requiring on-the-fly pit stops

Mercury: Park Lane 66 - 68 7 L Engine

LSM Spring Compressors

1995-2004 Chevrolet Blazer CID 350 GAS RWD

Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 3 Series - 8.875 in - GM 12-Bolt 49-0039-1 R010003YM Threads are 7/16"-14 x 1RICHMOND is the leading manufacturer of professional quality, hi performance ring and pinion sets. For over 80 years, the Double Diamond has signified the highest quality gears in the racing industry! GM 12 Bolt Installation Notes: When replacing a 2. 73 3. 90 ratio with a Richmond Hi Performance Ring & Pinion, the carrier must be replaced with a carrier from a stock 4. 10, 4. 56 or 4. 88 ratio. When installing 5. 14 to 6. 14 ring & pinion sets,