I am in the process of reassembling my 1970 383 roadrunner, I now have a 440 in it.I need a new radiator and was looking for a non OEM product, price for a stock one is out of my ballpark.I would like to spend between $200-250 for the radiator.

Questions?
What size will I need? I read 22” and also “26 – what really fits in the mounting?
How many core? 2 or 3 – I live in upstate NY where it is not extremely hot. I was going to think 3
Can I get a aluminum similar in stock appearance and paint it black or will this hold heat?
Finally how about a name of a supplier for a good quality radiator?

I am sure there is a thread on this but came up empty in my quick search. I apologize for all the questions but this is a great site for getting the knowledge.

Thanks