1967 D21, I have been pulling for 4 years and really enjoy it. I bought this tractor from a farmer five years ago with the rear end locked up, it had a cab on it with duals. I have worked on it every year increasing the HP, looks, and safety features. Waiting on a roll cage which might complete it untill next year. It is a 426 block, 800cc A-Pump, 3x3.5 single charger, intercooled with ice box, I run road gear and one above.