February/March 2006. Out with the old oil burning 305HO and in with the fresh 350. Mildly built but with the stock 350 heads and 76cc chambers with 1.94 valves. It all went together without any probs and didn't even crack the heater box. I kept all the Emissions intact even though they aren't necessary in IN, even put the Edelbrock TES headers on. My mistake, Now its time to get rid of it all and go with more muscle and less junk under the hood.