help visous fan worth it or not???

i have a 68 dart 340 with stock rad pwr strng and breaks
i just got a stock shroud for it so im sure that will help cool it

i scratched my nice coated fan some how and it will need to be redone
or do i spend a little more and get one of these????

will there be and clearance issue fan and a factory spacer on it now and will
i have a problem running the shroud with that after market fan


thanks