help visous fan worth it or not???

As I recall, most of your posts have lead me to believe you're doing a stock type restoration on your car. If you have the stock type early cast iron water pump the Mopar viscous fan setup should fit with no problems. If you've switched to the later aluminum water pump with the inlet on the passenger side you can probably get enough clearence by switching to a Jaguar viscous unit with the Mopar fan. The Hayden part number for the Jaguar clutch is 2765.

If you use it, you might want to check the fit of the Jag unit on your water pump shaft. I'm not sure that it's a tight fit. The clutch needs to fit tightly on the pump shaft to be sure it's centered. You might have to fab some type of simple bushing.