Replacement Radiator Help and Alum vs OEM style

My replies below are underlined and italicized.
http://www.mopar1.us/radiator.txt it says the rad is for a 69' 383 C-Body. Back in the day it used to be 4-Core and now its Big Tube Alum 2-Core.
The US Rad aluminum radiator is 'assembled' in the USA. Core and tanks are imported. Also, core is dual 1" as is ECP. Both may get the job done fine. Either or Both may not. There is absolutely no way to tell without trying.

I'm trying to make sure my shroud will fit and Biggest problem i'm finding is that after talking with three different ones today nobody at these companies seems to have:
C-body and A-body shrouds don't interchange. They are not even close. So if you choose a C-body rad, you need a C-body shroud. etc. That assumes the mfg has made provisions for the proper shroud.

This: 66-70 Mopar C-Body 26x17.5 Aluminum Performance Radiator | Cold Case Aluminum Performance Radiators (doesn't line up and 4 hrs later still waiting on a response)
I'm pretty sure I responded? I monitor all the Mopar forums and I think I am caught up. Any 26" radiator in an 1969 A-body is going to require modifications. I don't believe an A-body ever had a 26" radiator. If I'm wrong about this, then the C-body rad will fit the support fine. If you use a C-body shroud, that will fit fine as well.

And this: 26" Big Block Mopar Radiator (these guys are actually closer to the right dimensions but guy I talked to said i gotta look at the small block rad for more dimension specifics) Problem with this outfit is a simple www search reveals there are quite a few unhappy campers out there

ECP has nothing unique. We have all the same dimensions they have plus more applications because we've been on these forums for 2 years now and have taken all the input given very seriously. Their core is also just 2 1" tubes like US Radiator. Again, might be ok for you. Might not. That's a chance you need to decide. I have always been consistent. Our philosophy is the same as Griffin. Get the maximum cooling and know you got the max. Then if you have issues, you know it's something else! :)

Going to make a decision tomorrow to either order the Duralast from Autozone and match my stuff up to see if it fits when it comes in or possibly the Speed cooling one.

*****Since a byproduct of doing what we do with old cars comes with being gluttons for punishment anybody want to chime in with more choices or thoughts...

*There coming to take me away..Ha Ha Hee Hee Ha Ha to the Funny Farm!

Ha! I dont' blame you. There's a lot of choices. Most may get the job done. However, if you end up like my situation, the difference between 4 row, dual 1" and dual 1 1.25" may make all the difference in the world. I tried them all on my stroked 462 Pontiac and none of them would keep temps held. I'd creep and creep and creep until I had to pull over. except the 1.25" tube model I finally tried (not even a Cold Case at the time) It kept temps at 190 all day long. Since then, of course we installed a Cold Case and it does the same. 190 all day long.