Viscous fan package?

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Are you sure that’s factory? I’ve never seen one like that OE before, but there a ton I haven’t seen.

Pentastars and pn's...im sure.
There are 2 different factory flex fans, 18 and 20 in. that I'm aware of. Probably more, these are what I've found.
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Pentastars and pn's...im sure.
There are 2 different factory flex fans, 18 and 20 in. that I'm aware of. Probably more, these are what I've found.
View attachment 1715543245


Wow. Do you have any idea of what year and what package had those fans? That’s similar to the fan I use, but mine isn’t OE.

Like I said, I’ve never seen that, but I haven’t seen it all by any stretch.
 
20" is 1974-79, A,B,C and E, 318 thru 440
3462190

18" is mid/late 70's up, could be hd cooling on a slant. parted a bunch of those.
3870107
they both have a healthy pitch to them.

I'm running the 18" on my Demon.
2 core alum rad, JSD G126, standard pump, no shroud(fitted one but doesnt seem to need it)
zero deck 60+ 360, KB 107's, 750dp, airgap, big valves, ported heads, comp xs262(?) cam, 727 w 3400 stall, 4.10 gear and dougs headers.
Runs about 180-190. No heat issues even on a 110* day.
Of course it will creep up sitting at a light but neutral and a couple hundred extra rpms and its good.
Shroud will help reduce low speed/traffic heating.
 
Dont know , I doubt it , got any pics of ur set up ?
I ran the nuts only ,till this last change , had no problem w/ it/them.

I started all this by changing my Frankenstein belt set up to a 70 up on my 69 cuda. I went from the cast 69 water pump to the 71 aluminum pump and lost about an inch of clearance to the radiator there.

Since my old radiator was a b body unit and leaking, and the bottom hose changed sides with the new water pump, I bought a cold case radiator. The radiator is very well made, but looks to be a 1/2 or so thicker than the stock one. I had to buy the Hayden 2947 to make up for the lost room. I am running a 7 blade fan off a dodge truck.

Since I am too cheap to buy an OEM fan shroud ( and according to my wife massively over budget already) I made one from two top halves of a 90s Ford Explorer. Fits nicely, and the best part is it can be installed in two pieces which is really nice for fooling with the (swear word) bolts on the fan clutch. Bad news is if was being paid by the hour, my shroud would probably cost as much as a minivan.

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