I'm in the middle of an engine swap, and I pulled the radiator outa my 86 carbed parts car, and I'm putting it in my 88 FI car. The 86's rad is just in better condition.

 

Anyway, when pulled the rad out of the 86, it has these two little molded lines on it, which are circled in red in the pic. The rad outa the 88 has neither of these.

 

The top line is capped, so it doesn't matter, but the lower isn't, and wasn't attached to anything on the 86. It wasn't leaking either.

 

So what are those, and can I just ignore them?

its the auto tranny cooler

Eh noah beat me to it..

So what are those, and can I just ignore them?

yes, you can ignore them - as long as the car you are putting it in doesn't have an AT

Cool thanks guys.