I would recommend the MSD pump. Thats what I plan on using in my 64. It retails at summit for $105. As far as pressure I would use a corvette regulator/filter with built in return, I believe from an 07 vette (I think its about $75 at the dealership). And the vapor line your referring to you mean the EVAP? You can delete that. Not necessary. The fuel rails you have should have a return line on them already? If you can swap them for a set of non return ones I would do that and use the vette reg/filter I was referring to, that way you can save some fuel line and mount it toward the rear. I have a set if you are interested. Otherwise just use the ones you have with an aftermarket inline regulator such as Professional Products.