question about cooling your engine oil

I'm sure this isn't a novel idea, but here's the question:
My oil filter is being cooked by my headers. I thought about putting a heat shield sleeve on it, or maybe relocating the filter. Then I thought, well, if I'm gonna relocate the filter, why not run the oil through the trans fluid circuit in my radiator. I have a 4 speed, but the new radiator I got has a circuit for trans fluid that is currently plugged with bolts. If I hafta run hoses anyway, should I run the oil through the trans fluid circuit?
Are the ports in and out too small?