[Grip]

More info...I looked up the rotor for a 71 G-10 and found this on Napa's website:

It list a BUNCH of cars that are 4.75 bs as interchange

Rotor & Hub Assy - Front - Premium

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Front

Part: NB 4885542
Product Line: NAPA Brakes Rotors & Drums


List Price
Your Cost
Unit
:
:
:
93.16
62.80
Each

Qty

Features & Benefits
NAPA Premium Rotors Are Designed To Improve Stopping Distances, Minimize Brake Fade & Extend Pad & Rotor Life.; The Non-Directional Finish On NAPA Premium Rotors Reduces Noise & Braking Roughness.; Vane Configuration Reduces Temperatures & Improves Performance.

NAPA Brakes - Complete Line-Up

Attributes
# of Bolts : 5
Bolt Circle Diameter : 4.75"
Brake Rotor Diameter : 11.005"
Brake Rotor Discard Thickness : .965"
Brake Rotor Thickness New : 1.035"
Brake Rotor Type : Disc Brake Rotor & Hub
Height : 4.639"
Includes ABS Inner Sensor Ring : No
Includes Inner Bearing Cup : Yes
Includes Outer Bearing Cup : Yes
Maximum Lateral Runout : .004"
Mounting Type : Type J - 1 Piece Or Integral Hub & Rotor Assembly. Rotor & Hub Are Cast As A Single Unit. Wheel Studs Are Pressed Into The Rotor. See Diagram For More Information.
Vented / Solid : Vented

Warranty
12 Months or 12,000 Miles Whichever Occurs First

Warranty PDF

Material Safety Data Sheet (MSDS)
There is no MSDS for this item
Application Information: 1971 Chevrolet Truck G10/1500 1/2 Ton - Van
Per Car Qty: 2


Buyers Guide
Make Model Engine Year(s)
Buick Apollo 1975 - 1975
Buick Century 1973 - 1977
Buick Estate Wagon 1977 - 1978
Buick Lesabre 4.9 L 301 CID V8 1977 - 1978
Buick Lesabre 5.0 L 305 CID V8 1978 - 1978
Buick Lesabre 5.7 L 350 CID V8 1977 - 1978
Buick Lesabre 6.6 L 403 CID V8 1977 - 1978
Buick Regal 1973 - 1977
Buick Skylark 1975 - 1978
Cadillac Seville 1976 - 1976
Chevrolet Camaro 1970 - 1978
Chevrolet Caprice 1977 - 1978
Chevrolet Chevelle 1973 - 1973
Chevrolet Impala 1977 - 1978
Chevrolet Malibu 1973 - 1977
Chevrolet Monte Carlo 1973 - 1977
Chevrolet Nova 1975 - 1978
Chevrolet Truck El Camino 1973 - 1977
Chevrolet Truck G10/1500 1/2 Ton - Van 1971 - 1974
GMC Truck G1500 1/2 Ton - Van 1971 - 1974
GMC Truck Sprint 1973 - 1977
Oldsmobile Custom Cruiser 1977 - 1978
Oldsmobile Cutlass 1973 - 1977
Oldsmobile Delta 88 1977 - 1978
Oldsmobile Omega 1974 - 1978
Oldsmobile Vista Cruiser 1973 - 1975
Pontiac Bonneville 1977 - 1978
Pontiac Catalina 1977 - 1978
Pontiac Firebird 1970 - 1978
Pontiac Grand Am 1973 - 1975
Pontiac Grand LeMans 1975 - 1977
Pontiac Grand Prix 1973 - 1977
Pontiac GTO 1973 - 1973
Pontiac LeMans 1973 - 1977
Pontiac Parisienne 1977 - 1978
Pontiac Phoenix 1977 - 1978
Pontiac Ventura 1975 - 1977