Chevrolet 10 1971 Series Chassis Service Manual page 336

FUEL TANK AND EXHAUST SYSTEMS 8-12
Fig. 16— Exhaust System Tail Pipe Attachment
«
Make sure that exhaust system components have at least
IMPORTANT:
3/4 inch clearance from the floor pan to avoid possible overheating of
the floor pan and possible damage to the passenger compartment carpets.
Fig. 17— Exhaust System, C 10 and 20 Series
Except Fleetside Pickup
10-30 CHEVROLET TRUCK SERVICE MANUAL