[mr.mud1]

i think what you have are factory tanks and an aftermarket re-cored core.i have a big block 72 built at the Fremont,Ca plant and there's no tag from Craig Mfg on my core from original.there is a tag full of numbers soldered to the tank on the pass side a little ways down from the rad cap.i can get you a picture of that tag if it helps.here's my rad after i re-cored it.how many rows of tubes in your rad?mine was 3 rows and that's how i re-did it,could've been 4 though.