Big block fan clutch

I`ve seen a lot of threads about trying to get a fan clutch to fit on big blocks in our A-bodies. Whether your car came with a bb or not ,and especially when using aftermarket radiators, there`s very little room for a fan clutch to be used. My car (a factory bb car) has only 3.25" from the water pump pulley to the aftermarket aluminum radiator. I found using the Napa # 261306 fan clutch along with Napa # 209855 fan blade comes in about 2.65" overall and allows just enough room to squeeze the radiator in. I used 4-5/16 x 3/4 bolts for the blade to clutch attachment and 4-5/16 x 1 for the clutch to water pump attachment. I have about 1/2" between the end of the clutch and the radiator. The blade sits back about another 1". The clutch runs around $65.00 and the blade $72.00. Steep, I know. If you have room (like on a smallblock ) then just use the Mopar Performance unit but if you have little room to spare then this a viable alternative. Here`s a couple pics:

Those are Hayden parts (clutch: #2765, fan: #3618 ) Napa marked them way up ($70 total through Schucks/Kragen).

How's it cool?

70Duster440 said:

Those are Hayden parts (clutch: #2765, fan: #3618). Napa marked them way up ($70 total through Schucks/Kragen).

How's it cool?

Click to expand...

I`m gonna be sick...... cools great though!

Longgone said:

I`ve seen a lot of threads about trying to get a fan clutch to fit on big blocks in our A-bodies. Whether your car came with a bb or not ,and especially when using aftermarket radiators, there`s very little room for a fan clutch to be used. My car (a factory bb car) has only 3.25" from the water pump pulley to the aftermarket aluminum radiator. I found using the Napa # 261306 fan clutch along with Napa # 209855 fan blade comes in about 2.65" overall and allows just enough room to squeeze the radiator in. I used 4-5/16 x 3/4 bolts for the blade to clutch attachment and 4-5/16 x 1 for the clutch to water pump attachment. I have about 1/2" between the end of the clutch and the radiator. The blade sits back about another 1". The clutch runs around $65.00 and the blade $72.00. Steep, I know. If you have room (like on a smallblock ) then just use the Mopar Performance unit but if you have little room to spare then this a viable alternative.

Click to expand...

I picked up these two items today in hoping that it would work on my 71 Dart with a 383/727 auto using a Northern Radiator model #205197, but the fan clutch is so close to the radiator maybe an 1/8" to 3/16 clearance that I would not feel comfortable running this set up. I'm going to have to start looking at electric fan set up.

You're the man....thanks for sharing!

Dragonsteel said:

I picked up these two items today in hoping that it would work on my 71 Dart with a 383/727 auto using a Northern Radiator model #205197, but the fan clutch is so close to the radiator maybe an 1/8" to 3/16 clearance that I would not feel comfortable running this set up. I'm going to have to start looking at electric fan set up.

Click to expand...

can the radiator be moved forward
on my dart I removed the radiator mounts, placed the radiator where I wanted it, then re-soldered it

draginmopars said:

can the radiator be moved forward
on my dart I removed the radiator mounts, placed the radiator where I wanted it, then re-soldered it

View attachment 1714974045

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It could, but it's aluminum which i'm not capable of welding. Been looking at options for this now i'm thinking of just going with a flex fan as it would be the simplest option. I have exactly 2 5/8" clearance from the front of the water pump pulley to fins on the radiator not much room for anything but a flex fan.