 This was the last year of the RPO Z28, which shared the same drive train and engine as in the previous year (1973), based on the Corvette L82 special high-performance engine (the Z28 would re-emerge in 1977 as its own model and no longer a RPO).Camaro sales increased to over 150,000 units, of which 13,802 were Z28s (the highest 2nd-generation Z28 production to this time) despite the energy crisis fueled by the Arab Oil Embargo.Two ponycar competitors were repositioned in the marketplace this year.