Thumbnail Filmstrip of Milodon 12700 Big Block Chevy Mk4 - 65-79 Gear Drive Injected/Blown Images
12700 BB Chevy 396-427-454-502 Standard Height cam - Gen I to IV 65-79
Quit worrying about breaking a timing chain when running high valve spring pressures -
For Blown engines and engines with high Valve Spring Pressure
* fits Dart big M Blocks , Dowell pins have to be removed during installation and re installed with either 5/16" Milodon Dowell pins or other manufacturers.
Milodon BB Chevy Injected Style Gear Drive
4 Bolt Gear -
pattern to cover all 4 bolt large pumps or all extensions made by Enderle or Alkydigger
Gear Drive Idler Style: Single idler
Maximum Advance/Retard at Camshaft: 6 degree
Maximum Advance/Retard at Crankshaft: 12 degree
Thrust Bearing Included: Replacement thrust washer kit = 12959 if you need one
Notes: Designed for fuel pump/ blower drive.
Cam timing positions: advance 0, 6.5, 12, 4, 10, 2, 7.5, retard: 0, 7.5, 2, 10, 4, 12, 6.5 degrees.
Not designed to work on engines with a knock sensor
1-5/8" Front to back where mounts to engine block.
Steel billet Gears .
We have the extensions available in : 2” 3” 4” 5” 6”
Milodon -gear drive assemblies are designed for all-out competition, but work equally well in any application. Highly recommended on Blown or Nitro engines. Their proven fixed idler-gear system is capable of maintaining consistent cam timing without siphoning off power, the way 4-gear types can. Timing changes are easy via Milodon's adjustable bolt-pattern cam gears and hub assemblies. Made for strength and durability, these gear drives will last indefinitely. They're available in a flat-cover style, 13200 which uses a stock-type water pump, or an injected/blown style, which doesn't use a stock type.