i have a big block 4 core radiator with the code "OD" stamped into the tank.this is for a standard transmission car.i think its either from a nova or a camaro.
question i have is what did this originally come out of?and was it high out of a high performance car?

OD was used on 67-68 Z28s I don't think it was used on the big blocks.I think it is a small block with a manual trans but at least for a Z28 and maybe others Someone else will know more.I got the same radiator but it was in a 69 Z28 must have been changed at one time

OD was used on the 68 and 68 L6 and Small Block with manual transmissions. The only 4 core radiators used were the 68 and 69 396 with A/C (both manual and auto) and the COPO 427 (manual and auto). If it really is an OD code, the core's been changed.

HERE'S (http://www.camaros.org/coolingsystems.shtml) some very good reading about radiators.

Ed

thanks guys