On my 67,I moved the alt to the pass side so I had to get a long w/p.Well I also have a clutch fan,which I want to keep.My problem is the fan won't fit on the 4 stubs of long w/p it has a smaller dia with 4 holes.The fan is 17".went salvage,but no luck. What to do?(no elec).

JUst say Derale 17XXX series only! They will provide more than enough air at idle and on the move....and are far more reliable than any clutch fan. Will also provide a slotted hole for your application. About $60 from Summit Racing. http://www.derale.com/flexfans.shtml

http://www.derale.com/img/ChromeHDFlexFan.jpg

That is a good series of fans that Steve mentioned.
But if you want to keep your clutch fan the only option I can think of is to get another water pump, most of the hi-flow or name brand pumps will have the water pump snout tapped for both sets of holes, and your existing clutch fan will fit one of the sets, or drill and retap your existing water pump snout.
Elongating the holes in your existing fan hub may work also, but the fan/hub balance maybe off after. I don't recomend this. Just my .02 worth!

No need for a clutch with a lightweight aluminum fan and spacer.

Ok went back to bone yard,found a 18" from early 4.3 blazer works great.