In 1964, a neighbor gave me a 1953 Chevy straight six and I swapped the motor out. The motor fit perfectly: bolt for bolt. The original motor had a bad connecting rod when I bought it and so this motor proved to be quite an upgrade.
I drove it with that straight six until the early 1970s when the steering gave out. I couldn’t find the part for it at the time and bought myself a 1950 Chevrolet pickup for a daily driver.
So, the car sat in my 2-car garage from about ‘72 till the early 80’s when I decided to rebuild it.
But, as a father with 3 young kids, you know the story…