Where is the catalytic converter on a 1970 Chevy truck?

Answer 1

There is no catalytic convertor on a 1970 Chevy truck. Emissions regulations, and the use of emissions reducing equipment, were not employed until 1973 when the body style of Chevy trucks changed to the square body style that was used from 1973 to 1987. Catalytic convertors themselves were not factory installed until the second half of 1975.

To date, any vehicle made before 1975 is exempt from emissions testing since the required equipment was not installed at the time of manufacture.