Grandfather's 68 SS Camaro.

[WILMASBOYL78]

Assuming it is a factory big block unit...each tank will have a 2 letter code which will indicate application. If the tag is intact, that will offer more info. There will also be a letter code on the larger tank which indicates the month of production.

You can learn more here; http://www.camaros.org/coolingsystems.shtml

-wilma

[JRC99]

Originally Posted by WILMASBOYL78

Assuming it is a factory big block unit...each tank will have a 2 letter code which will indicate application. If the tag is intact, that will offer more info. There will also be a letter code on the larger tank which indicates the month of production.

You can learn more here; http://www.camaros.org/coolingsystems.shtml

-wilma

I don't know why I didn't think to check CRG. D'oh! Will report back with any findings.

[JRC99]

Tags are long gone.

Also, is this the right fan for a big block car? It's 7 blades but to my uninformed eye they look awful short. Maybe smaller= faster, I don't know.

[WILMASBOYL78]

That fan blade is not a Chevy item as far as I know. The 68 BB had a short water pump and depending on HP rating or options like A/C you could have a fixed 4 blade or a clutch fan with 5 blades. The 4 blade fan would require a spacer to position it properly inside the shroud.

This info is well presented on the CRG page I sent you. Of course, you can adapt to fit your needs...more horsepower usually increases the need for proper cooling system components.

-wilma

[Too Many Projects]

Fan is an aftermarket flex fan. Moves a lot of air, but must howl like the devil above about 3,000 rpm.
In your second pic, 4th and 5th rows down under the upper hose neck, there are letters stamped in the tank. Looks like there are some on the other side too, but a little too dirty to make out in the pic.

[JRC99]

Originally Posted by Too Many Projects

Fan is an aftermarket flex fan. Moves a lot of air, but must howl like the devil above about 3,000 rpm.
In your second pic, 4th and 5th rows down under the upper hose neck, there are letters stamped in the tank. Looks like there are some on the other side too, but a little too dirty to make out in the pic.

Good eye! Stamped I L so it very well could be the original radiator for the car. That fan will be replaced with an OE style. I don't know what brand is on it but I've heard enough stories about the old Flex-A-Lite fans breaking apart that I simply don't trust flex fans.

Unfortunately, I might be blind but I see no numbers on the fan shroud.

[JRC99]

I wonder if that's playing into the overheating issues that have plagued this car for 20 years. The shroud looks kinda funky too


I see 1969s had a 7 blade fan but the blades look much bigger and more curved than whatever the heck is on the car. I might snag one of those for it. I see they're reproduced and, well, date coded NOS stuff isn't exactly required for this car.

[Too Many Projects]

Somehow, over the past couple years, I've managed to acquire 4-5, 7 blade fans and only need 3. I'll see if I can find them all and figure out one you can have. They do require the thermostat/viscous clutch and most of them have one, but may need replacing.

[JRC99]

Need to update- Left side tank is I L. Right side is X I which doesn't show up on the CRG list. So if I understand this right (probably not) it was recored at some point and in order to make it work with the TH400 they swapped the right side tank to something else? If that's a thing that can be done, I really don't know. Unless Harrison/GM used the I L coded tanks on other radiators besides Camaros.

[Too Many Projects]

I find the IL tanks on Chevelles too but the X code tank may have come from a full size car and yes, these tanks are very interchangeable, as long as the core is the correct width for the tank.


The fan, if it is too small a diameter to fill the shroud, it won't be effective and in the couple pics we see, it has been noted that it isn't far enough in the shroud. It is mounted directly to the pulley and it should have a 3/4 to 1" spacer behind it.



What is the diameter of the fan shroud opening ? That will determine the fan blade size.
I'm having eye surgery tomorrow, so I'll look thru my fans later this week.