Having fitment problems with radiator from advance and napa

[Rob68c10]

The radiator in my 68 finally gave up. I ordered one from advance auto, too deep and wouldn't fit my mounts. Tried one from napa today, same thing.

I don't want to spend the money on an aluminum one until I tear the truck down. Mostly because I don't know what engine/trans combo I m going with.

I have searched and found a couple people happy with the rock auto ones, but I don't want to get it and be out shipping if it doesn't fit.