Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 3 Series - 8.875 in - GM 12-Bolt 49-0039-1 HVH - High Velocity Heads ALL76103 Constructed of 13-gauge steel

ALL76103 Constructed of 13-gauge steel

Trailing arm mounting hole centerline to edge of shock mount spacer is 4¼”

Timed spark port for vacuum advanced distributors located under the front fuel bowl

Standard O2 Thread M18x1

Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 3 Series - 8.875 in - GM 12-Bolt 49-0039-1 HVH - High Velocity Heads ALL76103 Constructed of 13-gauge steelRICHMOND 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,