Help with radiator number

I have looked around and found a lot of numbers listed but not this one. Radiator has brass top on it and says Chrysler 3640427. I have looked in some of my parts listings and online and no luck with this number. It is out of my race car I bought and was thinking of finding one to replace it by bolting in without a lot of modifying.

Any help would be appreciated.

Thanks

Todd

3640427, is that correct & clear on the radiator?

from '72-'73 light & medium duty truck Parts Catalog:

3640424 = '73 light-duty truck w/400 & 440 inlet (upper) radiator hose
3640425 = '73 light-duty truck w/400 outlet (lower) radiator hose

HEAVY-DUTY truck, maybe '74, maybe Motorhome ??

Snap a pic of it tomorrow. But it is clear. I looked at places online that listed them from all the mopars and it seemed like it skipped the number range I have. I will look again and snap a pic of it. Thanks for the help.

most of the truck parts are not included in many on-line listings & I ONLY have the '72-'73 light & medium duty truck Parts Catalog

6bblgt

Here is link for pics. Hope this helps some. I will keep looking also. Thanks for help.

rad pics

I would guess 73-75 pickup radiator. I you can get a picture of the whole thing, I should be able to confirm.

Bob