Need help choosing a junkyard engine

Run a hot (+) wire to the (+) side of the coil, use something metal (screwdriver) to cross between the large poles on the starter relay on the fender to get it to crank. It'll prolly need a good shot of gas down the carb too if it's been dry a while.

The 80 engine might be a 2 bbl. engine. They make a bunch more power than the 1 bbl. setup. Good luck.