There are a couple of surveys on the two forums that have a pretty good set of honest responses for each type of FF kit.
They show a good range of what was spent, mostly by guys that have the car done/driveable at this point. As with any
streetrod you can push the budget quite a ways with one off or custom changes and high end paint jobs but the ranges
shown on the survey are pretty honest/reliable information. They are a more real world number than the estimates shown
on the Factory Five Racing website. HTH
Dale