how are radiators in 69 birds fastened on the driver side? Passenger side has nuts in the core support panel, but the driver side just has a holes (and the bottom hole is recessed into a reinforcement which you cant get to the other side?

With my old core support the prior owner just used nut/bolt for both top and bottom and they cut away the bottom outer support as to get to the other side to put the nut on????

You use "well nuts" they are nuts with rubber expansion sleeve on them. Lowes or home depot carries them in their special fastner section.

thanks. any idea why this was done? Seems like they couldve easily put weld in nuts on this side too?

There were different sizes of radiator used with the same core support. It was a money saver.

I think it is for expansion. One side is bolted tight while the other can move a little with the well nuts.

Correct, on my 68, only one side has them to allow for expansion of the radiator core/tanks so you wont develope cracks or leaks.

thanks everyone, i found them at lowes. its amazing over the years how many fasteners i have found on cars that are rigged to work!

On the topic of radiators. How do you tell how many core radiator your car has. My car had a 326 with 2 speed auto tranny and no AC.But now has a 400 with a 400 tranny. Also lower gears in the rear. My car runs hot and I was wondering if part of it could be to small of a radiator. Already installed 7 blade clutch fan, thermostat, tranny cooler, flushed out fluids. Radiator was rebuilt some time ago but the car was parked for a long time after that. The only thing I have not done yet is check the diverter plate in the water pump for clearance and install a better radiator.

You probably have a 3 row core. If you take the cap off you can look to see(depending on how clear your coolant is)how many rows you have. You may want to get a 4 row or an aluminum one. Depends on how original looking you want it.