Questions for '51 Chevy

I have been pondering what I want to do with my '51 Chevy, I have decided for the '50's-'60's era correct hotrod theme. I was looking for performance parts for the engine and found an Offy 3 carb intake, it says for 235 and I have a 235 but mines an early dipper 235 and not a preassure 235, will the intake still work? I also want to use fenton cast iron headders, Smitthys mufflers and eco can tips but I know they will work. I want to get a sunvisor for over the windshield, the 1's I see on cars are smooth across, the 1's you can buy have a stainless steel strip in the middle, where can I buy the 1's that are smooth all the way across? Check out my new cardomain site, it's on my www link.