[AZKen]

Regarding radiator: I don't understand the problem you are trying to solve. Too many dimensions and not enough general info. Please state in general terms.

1. You want to find a radiator because the existing radiator is...........
2. "I want shorter than stock "because...........
3. You say there is "plenty of room", then it seems that there is not "plenty of room" because radiator is too close to "fan pulley". What about distance to the fan itself.
4. Do you have an electric fan now? or a mechanical fan now?
5. Do you have a long or short water pump on the SBC?

Regarding finding a new radiator: Once you know the size and thickness you need/want, then it's a matter of looking on ebay, find one and have it shipped. You may have to get one that is close to the dimensions and live with it. It's not a strict science to have a perfect size. After you get a radiator that you like and you mock it up, you will see what needs to be done. You will see several ideas and you will pick one. That's how you do it. It's hard for us to be specific because we don't have the actual radiator and it's mounting features in front of us. If you need ideas after you get a radiator, you can give us a few pics and we will advise.

As I said, I don't understand the basic problem. I understand you have a fit problem with a new radiator. The width and height does not have to be exact and the width is a little harder. Can you mount it in front of the crossover with bracketry modifications, either on the support or on the radiator or both?

Fresh air vents can be cable controlled or handle controlled depending on year. A Chevy could provide a solution. A cable control type or a modified handle could help your interference problem. Bending handle or convert to cable control or whatever. You can also move the fuse panel to a place that does not interfere.