Brian Burwell shared the attached photo’s of his repower of a Farmall 300 with a Detroit Diesel 2-53 and of it’s conversion process. I’m attaching them with his permission. Great looking tractor and conversion! My notes show a 2-53 will have 45 hp @ 2000 rpm, and 41 hp at 1800 rpm. With N-50’s I would think it could pull close to 50 hp with some smoke.