[1970GMC350]

Hello all! I'm in need of some help identifying my radiator. It's in need of a restore/replacement as it's pretty beat up, leaking coolant out of the upper hose, I think the trans cooler lines running into it are leaking somewhere and it has some rube goldberg plug in the top right above the tag. If it's the original, I'll pull it and restore it but, if it's not original, I'll probably replace it. The numbers/letters on the tag are "IF JG OY 136 3023708". Thank you in advance for any help!