Inlineal is right. There may be some things on the Toyota '6' that look like a 235, but little if anything will interchange. Those engines are not any better than a '235' built by GM. We had a LandCruiser in 1966, and it was low geared and wore out engines just like a GM. Valve jobs and rings, just like GM. Parts are high, and as soon as we could get a SBC put in we did. If I were to keep a vintage '6' truck running I would work with the newest 235, or upgrade to the 250 with 5 mains, and it will spin a lot faster than the 235. It will stay GM. If I wanted a 'fake' Napco a Toyota front/rear axles would work. They look beefy like Napco, they are narrow so they fit under an early truck without sticking out too far.
They have '6' lugs and could pass for a stock 4X4.
