Radiator pressure question?

just picked up a new aluminum Griffin radiator for a 57 T Bird like near free
it's going in my 50 Olds which is getting a rebuilt 55 Olds 324

the cubic inches multiplied per square inches of the core works
the installation fit is close

Pressure Question -
the Griffin can take a 16 or 17 pound cap can the 55 Olds 324 take that pressure
or is a 12 to 14 pounds a better option
Thanks for any input

 

More is not better. If that rad can't keep it running at less than 190 degrees unpressurized in temperate minnysoda, Something is wrong. Start with an 8 lb cap. I fix and recore a lot of rads. Too much pressure makes them bulge and split, failure rates go up.

 

Dont worry about the radiator, worry about your heater core, if you have one. Use the lower 7# or so as suggested.

 

7 or 8 pounds now that rings a bell yeah that's sounds like the answer
Thanks