When you say you took your old radiator in to get cleaned and checked, you either do it for a reason or not. Typically, one goes through the labor and expense due to an issue or problem. Removing it "just cause"?

I assumed improperly.

The best course of action? There are 5 businesses within 20 minutes from me that will recore your old radiator for $150. If you are having no overheating issues (my improper assumption) use your old tanks and brackets and 48 hours for the work, then reinstall without any mods, alterations or issues on fitment.

If you "need" an aluminum radiator, by all means buy one from a reputable, reliable and customer service orientated vendor. Cheap replacements are out there, but then again, you may find yourself trying to get service from somewhere (aluminum radiator vendor) that is 1500 plus miles away.

Good aluminum radiators with quality workmanship and service cost around $4-500..and will not blow a bead in a year.