I'm thinking of getting a Summit racing universal radiator because I can't find anything else that'll pair up with my current build. I just sold a radiator off and I could use some measurements of the front face for this build.
I went through something like this replacing and relocating mine in the rally car. The issue I had was I knew how much space I had, but rads are only sold based on their core dimensions, not overall, so knowing how large the end tanks were added some confusion. I just ended up searching and searching. I think our radiators (B13) are 25"long by 15" tall--that is overall. I'm not sure about just finned surface area (core).