Marty,
Did you--and do you recommend--switch back to the 13 lb. cap after replacing the radiator?
Believe it or not, the hairline crack re-emerged through the JB Weld patch, though it it still slowing down any coolant leakage fairly well.
I will likely get a new radiator very soon, as it is not worth the risk of failure, and incurred damage to the V-6.
Thanks for your reply!
--Glen--