Big Block Chevy Engines

These kits fit GM Mark IV, Gen V and Gen VI big block Chevy engines.

Will These Pulley Kits Clear the Cross Member on a C2 or C3 Corvette?

These kits normally clear the cross member on otherwise stock 1965 - 1982 C2 and C3 Corvettes.

That being said, issues such as age, condition, manufacturer, etc. of motor mounts can cause clearance problems.  Fortunately, most clearance issues can be solved by putting a spacer between the engine and the motor mount.  This was a factory solution for GM on 1966-74 big block Corvettes with air conditioning.  The factory style spacers are reproduced and are available from various Corvette suppliers listed below.  They are specified for big block, but they will fit Chevy small block engines as well.

1963 - 1964 engines will most likely have to be shimmed upward for the crank pulley to clear the cross member. Make sure you have enough hood clearance!

Part numbers for the engine mount shims:

GM #3910756 (for reference only, no longer available)
Corvette Central #302001, www.corvettecentral.com
Mid America Motorworks #670-199, www.mamotorworks.com
Volunteer Corvette #EN65X, www.volvette.com
Zip Corvette #M-2494, www.zip-corvette.com

Harmonic Damper

Some factory Gen VI engines may have a different harmonic damper that must be changed. See picture below.

	This is the factory Gen VI harmonic damper that must be changed. Notice there is no recess for the pulley boss to locate in.
	This damper is representative of the vast majority of big block Chevy dampers found. Part #10216339 is available from GM. Always make sure your damper is the correct balance for your engine.

Additional Notes

• Driver Series Kits are single 6 groove serpentine belt systems with spring tensioners
• Driver Series Kits are designed for use with electric cooling fans. If you need to run a mechanical fan, contact us and we can make modifications to the waterpump pulley. Also, this kit uses a reverse rotation waterpump, so make sure the fan is a reverse rotation fan.
• Our kits will not work with engines mounted with front motor mounts. Side motor mounts are required