HELP! Need Radiator! Any Ideas? 67 Dart

Oh well, I'm not taking off the new water pump I just hung. 1-800-radiator said had to be made $500.00+
Is the radiator from the 88 truck a 22" x 17.5? If it's the same size it would be worth the upgrade. I should have upgraded but did not know before doing the water pump!
The story of my life.....if there is a harder more expensive way to do something, I'm sure to do it that way and find out a better way later!
Thanks for the reply Dragginmaster...............

the core size is 18 x 26 which fills in the hile in the radiator support better.