Pat
Looks like engine from McKinnon Plant, April 22, from 71 Passenger 350/245 powerglide/turbohydramatic 350, or Nova 350/245 powerglide, or Chevelle 402/350/245 Turbohydramatic 350, or Monte Carlo 350/245 PG/THM 350, or Camaro 350/245 THM 350
Steve