According to the 1966 Motor's parts & labor manual, to R&R 409 engine in 1964 Chevy fullsize w/manual trans takes 10.4 hrs, +.8 hrs with A/C, and the shortblock assy (part # 3839753) cost $416.75. I opted for the high performance 409 here... Hmmm...what was the last year for Rochester FI? It's not in this book. Shannen