Vintage automobile factories

A few years ago, I searched for a local Chevette intending to fabricate a small tractor using the drivetrain as they were powered by GM's cast iron 4 cyl. engine. Wasn't successful. It seems that Mercury Marine had bought them all up to make boat motors out of them. AKA known as the Iron Duke, they could be modified for good torque and HP. Back in the 60's, my neighbor built one using a Crosley drivetrain.