Throttle linkage question

I am finally getting my stuff back together. But my question is i changed to carb set up what kind of throttle cable will i need.

Also this might sound stupid, but for the gas tank, because you have to change it so its down to like 8psi or something. I seen some things that look like a intank fuel pump without the pump on it, couldn't i just take the pump off the one in my tank and use those lines. Its the same thing isn't it.
 
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