Ok..quick question. I have the radiator from my 360 and one newer one for the 300. Both are in great condition..just don't know which one to use. I figured the 360 one would do better cooling but I'd have to figure out the hose connections cuz they're opposite from tge 300. Any thoughts?

 

A radiator shop can switch the inlet/outlet sides for you for about $50. I use a cross flow aluminum radiator for a v8, but it takes quite a while to warm up. I think I would use the 300 rad for simplicity sake. If it doesn't cool enough you can always throw a small electric pusher fan in front of the rad to help out.

 

300s don't run super hot in my experience.

However, when my radiator needed replaced, I got the larger option, which is about 6 inches wider. There's the HD and non-HD version. I have had both radiators in 110° weather, crawling up the side of a mountain in low range at 5mph, and never had the needle move. It does just fine.

But, if you're so inclined to use the 360 radiator, it'll be all custom hoses. If you can get those figured out, there's no reason you shouldn't be able to use it.