Later model radiater will not mount to the original holes. The original radiater was 22 inches wide. Later is 26 or 28 (I forget). Common practice is to use that radiater with or without its shroud and expand the window/opening to increase air flow.
Yes it is 26" wide. It's tall, a tight fit, as the rad cap has scuffed under the bottom of the hood. I don't want to spend 500 for a rad when I can get a new 70's rad for under 300.
