Fan Specification:
Maximum Fan CFM: 2300±200
FAN Diameter: 12.05" X 12.05" X 2.5"
Number of Blades: 10 blades (Plastic)
Amp Draw: 12.70 amps
Maximum Fan RPM: 2,250 rpm

This Shroud Compatible with:
1967-1972 Chevy Blazer 67-72/GMC Jimmy
1967-1972 Chevy GMC S/T Series Suburban Pickup Trucks
1968-1972 Chevy GMC K5/K15/K1500 35/3500 Pickup Truck
1967-1972 Chevy C/K Series C10/C20/K10/K20/K30 Pickup

Interchange Part Number:
DPI369,CC369,CU369,0369AA, 369

Other Part Number:
KKS369 ,CUC369 ,R369 ,RR369 DRMC369 MC369

OEM Part Number:
RA-CK67-3, RA-CK67-2 8010369, 433366

Shroud+Fans
The fan and the fan shroud effectively drive the heat over and out the engine compartment rather than thrusting it into the front of the engine.
The fan shroud basically houses the fan blades securing it in place and keeping it from damaging the other engine components that may disturb the smooth and even operation of the engine.
With excellent operating temperature management, allowable levels of engine temperature are stabilized.
Investing in proper maintenance though will considerably benefit the ride and driving quality in maintaining the ideal working conditions of the engine.