Customer asked me which I considered the better; all original or modified. I told him if he was going to drive his 1957 truck under 1957 conditions then original was better. Bias ply tires, non power drum brakes, and deep gearing is the cat's meow for a 50mph speed on mostly unpaved roads and still fine for short cruises or parade use. If one is going to be on a modern road with present speeds then radial tires, updated brakes, and gearing that allows one to not be in the way of other traffic is better. On his 57 3100 we mounted radials, updated brakes, swapped tranny with a Borgwarner overdrive, and used tie rod assist power steering so caster could be increased on the straight axle. He now has a stock appearing truck that cruises 70mph while turning the 235 around 2300rpm, stops good, and can go a mile with no hands on the steering wheel.