Best original looking radiator

4spdragtop said
I would take your old one to an old rad shop and have it recored. They will put an additional row in it(if you like).
I did that with my 69 340 rad. Be diligent on maintaining/flushing your cooling system. For the amount of miles we put on these relics it SHOULD be good. Provided everything else(fan/shroud t-stat, pulley etc) is in good working order.
The guy who did mine(Dennis) is/was affiliated with Glen Ray someway, somehow. The rads he has done and brass work is/are works of art.

It's probably a small world of shops that order new cores with the 'header' for the bubble top radiators. Wouldn't be surprising if some of them work together on getting and keeping stock. And as you know there's a lot of cross border automotive business...

mcodecuda said
Not cheap but try Glen-ray radiators. Glen-ray Radiators - All New Licensed Mopar Chrysler Dodge Plymouth Radiators

You will need to contact them to see if they have the tanks to put one together. If you don’t care about numbers the other option is to put something together using a big block b-body radiator.

Yup! I completely agree. Best thing with them is to call.
They may even be able to put something together using parts from a 22" B -body radiator, or that might even be rarer.

FWIW. '69 Dodge FSM shows 383 A-body used a 22" radiator with a 18" fan with 7 1-1/2" deep blades and .7" spacer.
Bubble top radiators don't look like the square tops at all.
'69 Roadrunner with B engine

Below is a small block radiator Bob (Glen-Ray) made up using a '68 top.
Notice the position of the tank and the notch on the leading tip of the fan blades.