I also do not understand the value of taking a perfectly good running
413 out and putting a crate motor in only to reinstall the 413 for shows.
While the engine blocks interchange just fine, the transmissions are shaped
differently and require different mounts. Your existing transmission is a
cable shifter, which means you are restricting yourself to a '62 through '65
aluminum body torqueflite. I hope your crate motor is internally
balanced, because all those transmissions require it of the engine. Did I
mention you'll need to change the length of your drive shaft? In
addition, the crate motor wiring is different enough that it's not a question
of disconnecting and reconnecting. Your crate motor will likely have a
different starter/alternator (assuming that your original engine even has an
alternator). It may even have electronic ignition. Then there
are the sensors for the gauges and speedometer -- guaranteed different. A
modern crate motor vs. a vintage 413 is not a swap, it's an upgrade that's not
easily uninstalled.
