Found it and will attempt to post the link - called Flashback F100's.  Has been a very good source of vintage Ford truck parts,  great folks to do business with when restoring my truck many years ago and interesting web site to explore.  Hope this helps.......      http://flashbackf100s.com/about_us






64F100 57FAIRLANE500

Some of these trucks (71-74) were built with fan shrouds depending on engine option. A shroud would be a big plus if your truck doesn't have one. There usedto be a fella who specializes in vintage Ford trucks and salvaged parts. I'll try to find that source and report back just in case you might want to explore that option.  

64F100 57FAIRLANE500

If the temperature creeps up when idling at a stopped intersection and then does not quickly recover when moving then the smaller water pump pulley with definitely help. These vehicles did not heat up when new or for many years after being built and the only real difference is the formulation of the gasoline which we do not control. Good luck

56 Vic, B'Ville 200 MPH Club Member, So Cal.

Thanks FD, I'm thinking if I go with a 5 blade, maybe a little bigger (need to measure mine first) I should be good to at least to start with.  I'm here in FL where it gets mondo hot during the summer, so I want to make sure that I don't have any overheating issues.

1964 Ford F100 w/ 292 Y-block
-Central Florida-

There is very good air flow through the radiator in these trucks. I have never ever had any overheating issues with my truck even on +90* days in traffic. Engine is a 312 with a mild cam. I'm presently running a 5 blade fan on a fluid clutch (Mustang) to keep it quiet at higher rpm's..Even with the stock 4 blade, there were no heating issues either. As DLR stated, an electric fan will add load to the electrical system which would be quite heavy for a generator if that's what you are running. Like, there's no free lunch. This is simply my exprience with my 64 F100, your results may vary.

64F100 57FAIRLANE500

Posting removed. Information was for a car. Unknown if it pertains to a truck. Sorry. 

56 Vic, B'Ville 200 MPH Club Member, So Cal.

If I need to replace my radiator, I'm also thinking of going with an electric fan.  I'm not worrying about originality, I just want the engine to keep cool, look and run good and not lose any HP unnecessarily.  Do these fans wire into the current temp sensor, do to they require their own?  

1964 Ford F100 w/ 292 Y-block
-Central Florida-

Richard, I used a Trans Dap 8300 from Summit. 6-1/8 for a Mustang. It was steel chrome and painted it black. It lines up with the closest damper pulley to the engine. Since I have 3 lower pulleys I needed a spacer kit so the fan would clear the third one. I believe I used a spacer behind it also for perfect alignment. It solved my heating up in traffic or idling by speeding up the pump. 

56 Vic, B'Ville 200 MPH Club Member, So Cal.

Thanks, Paul.

MplsMike
'56 Parklane
Minneapolis, MN

The NAPA # 6 also goes under the number  THM 6





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ