Alan,,,,,,,
This San Leandro Dodge 'Dart' is from San Leandro, California (northern California).
This car ran at the AHRA Track - Freemont Dragstrip.
The Class HSO-1 is for H/Stock Optional-1
'Multiple Carburetors' - 'Solid Camshaft' - '266 to 280 Cubic Inches'
This D/Dart was running with the 'optional' Edelbrock #D-66 Aluminum Dual-Plane / Dual-Carb Intake
with twin Carter AFB #3853 (500 CFM) Carburetors, with smaller Secondary Jets. (.065")