The Programmed Combustion Process (PROCO) or 'stratified charge' engine concept has been under development at the Ford Motor Company since 1958. Under contracts with the United States Army Tank-Automotive Command initiated in December of 1967, Ford converted ten L-141 military utility truck engines to PROCO. Four of these engines were installed in M-151 jeeps which were tested for emissions and durability. Another four engines were used in dynamometer testing. At the conclusion of the Army program, the Environmental Protection Agency contracted to have three of the latter four engines installed in 1973 Ford Capris. The purpose was to evaluate the PROCO engine in a vehicle more representative of typical passenger cars than the military jeep. This report covers the testing of number three of the four military jeeps, and preliminary testing of two of the Capris. Also included are results of non-regulated emission tests conducted on one of the PROCO Capris and a standard 2.0 litre Capri at Southwest Research Institute.