Hello. Here is my engine swap thread. 2004 Silverado 4.3L to 357ci built SBC. Day One: Sept 6th,08 Prepped the truck, removed a few body panels that would be in the way. Drained the coolant, disconnected the battery. Unbolted the Y-pipe from the headers. Disconnected all of the engine sensor harnesses. Unbolted all of the bell housing bolts. (So I had thought) Removed the radiator hoses. Took off the accessory brackets, Alternator & P.S. pump. Removed the starter and disconnected the torque converter from the flexplate. Transfered the accessory brackets, studs & bolts over to the SBC. Modified the A/C bracket to clear the valve covers. Spaced the A/C compressor to also clear the VC's.