Is it possible the fittings in the bottom of your original radiator will come off and then fit into the new radiator?

Sounds like you have already cut your original lines. You should be able to add (or remove) more of the bend at a factory bends on the line to meet with the fitting at the rad.

Direct fit aftermarket stuff means it sort of fits in the hole, and things can be adapted to make it work. They assume that when you buy a replacement part, originality is no longer a concern and you will adapt your stuff to fit their almost correct stuff. As much as it might suck, that is the world in which we now live. Gene