I'm building a '32 Ford roadster and trying to select the drive train components. I haven't researched this very much, but is there any real advantage for me to use a 200 4R over a 700 R4. My concerns are for cost, strength, physical size and performance behind a sbc. While I'm asking opinions, if you a running either of these transmissions, what ratio rear axle are you using? Thanks for your response.