Need Bigger Radiator?

I bet you have a 17x22 rad. if you recore it, go with what they call a "high efficiency". get 3 rows of course, but the hi efficiency is when the rows side to side are 3/8" on center instead of 1/2" on center. for every 9 rows you now get 12. that should be plenty. remember, do it once, do it right.