My poor tired motor is about done and I finally have the cash to do something about it. My plan is to get another motor so I can swap them out in one or two days instead of pulling my old motor and trying to find a way to get it to the machine shop etc. After looking through the local paper my choices are. buy a "high performance 454" assuming it isn't due for a rebuild itself. buy a SB400 and have it rebuilt buy my buddies 78 blazer and pull the motor, rebuild it, then try to sell off the parts. buy a long block from a rebuild shop and swap my parts over. buy a gm crate motor. Prices for the finished product are all about the same. What would YOU do?