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Dewitts. Get their radiator and cooling fans and you will never worry about it again. I have installed many of these on various cars and they work. Recently installed their brushless fan and radiator combo. Nice setup. Yes they are not cheap but quality never is.
I have the Flex-a-Lite 180 on my '69. Best fan I've ever had, keeps my 628hp small block at 180° on the hottest days idling in traffic. It also has very low current draw for its 3300 cfm. I just used metal straps cut to size with bolt holes on the ends, and attached the fan/shroud assembly to the radiator bracket using the stock bolts on top and bolts/brackets provided with the fan on the bottom.
This pic is limited, but it shows the top attachment...
Dewitts. Get their radiator and cooling fans and you will never worry about it again. I have installed many of these on various cars and they work. Recently installed their brushless fan and radiator combo. Nice setup. Yes they are not cheap but quality never is.
The only thing with the dewitts / dual spal setup is the average mounting hardware. The 2 Z bars top and bottom are held on to the RAD with self tapping screws / pre-drill holes your self. The bolts holes to hold the fans to the Z bar's is difficult to install while in the car ( problem if you need to remove and re-install. I dont think the Z bars will do well with multiple remove / install's. I purchased my Rad / Fans at seperate times so hopefully there is a complete kit for both with better mounting hardware.
C3 stroker.....decently easy? one of the reviews on summit said did not work..........
.......Don't believe that negative review......see my pic and believe your own eyes. I mounted the relay next to the horn relay. Also installed a toggle switch for a manual turn/on and shut/off if wanted.
Brackets are supplied and I used them to attach to the bottom rad bracket underneath at the bottom. I cut them to size at the top so I could attach them to the stock existing bracket bolts. It really is as simple as it looks.
The only thing with the dewitts / dual spal setup is the average mounting hardware. The 2 Z bars top and bottom are held on to the RAD with self tapping screws / pre-drill holes your self. The bolts holes to hold the fans to the Z bar's is difficult to install while in the car ( problem if you need to remove and re-install. I dont think the Z bars will do well with multiple remove / install's. I purchased my Rad / Fans at seperate times so hopefully there is a complete kit for both with better mounting hardware.
You are right about multiple installs, the tek screws would probably be loose or even strip out. We use the tek (self tapping) because of the variable gap between the A-Arm and we want the customer to be able to make an adjustment if necessary. One thing you can do once the final location is determined is remove the tek screws and pop rivet the brackets to the channel. That would make it permanent.
Also, you never want to remove the hex bolts that hold the fans to the brackets because of the free nut in the back side. You loosen those only, and then tighten after the tek screws are tight. It's not a bad system and it has worked for us for many years. It looks a lot better than the other over/under brackets systems that cost about 4x as much.
C3 Stroker - is that the stock copper/brass rad? For my planned 427, I am debating either an aluminum rad vs doing the same thing you appear to have.
In my case that would be upgrading my electric fan and pulling more cfm with my existing 4-row copper rad. I like the Flex-A-Lite 180, and it seems to me that a 3300 cfm fan with a good clean copper rad should work.
The dual 12 inch fans from summit work great for the price. If you don't have AC they also work great as pusher fans. Almost look factory the way the 27 inch fans lay in the radiator between the tanks.
C3 Stroker - is that the stock copper/brass rad? For my planned 427, I am debating either an aluminum rad vs doing the same thing you appear to have.
In my case that would be upgrading my electric fan and pulling more cfm with my existing 4-row copper rad. I like the Flex-A-Lite 180, and it seems to me that a 3300 cfm fan with a good clean copper rad should work.
I painted it with Eastwood Radiator Black paint to keep a stock look. I installed this set-up over 10 years ago, but now it is available as a kit for C3's if you wish to change your rad.
.......Don't believe that negative review......see my pic and believe your own eyes. I mounted the relay next to the horn relay. Also installed a toggle switch for a manual turn/on and shut/off if wanted.
Brackets are supplied and I used them to attach to the bottom rad bracket underneath at the bottom. I cut them to size at the top so I could attach them to the stock existing bracket bolts. It really is as simple as it looks.
Hmm... Those uppers looks strangely familiar. Always more than one way to skin a cat!
Be careful of clearance to the A arms. On a SB Dewitts system that I ordered with the fan premounted, I had to remove the fan and slide it over to the passenger's side. On the BB pictured, I used a fan from a 69 camaro and had to trim the plastic housing on the passenger side and had very little clearance on the driver's side.