Technical 28-9 on 32 rails Radiator height

For those of you that have built a 28-9 on 32 rails, what height radiator did you end up going with? From measuring everything it seems like a 3" chopped 32 radiator will work but without being far enough along to mock up for a visual, im looking to see what you went with. Thanks, Joe

 

i think 3 is correct.i used a stock height model a rad in mine a cut and redid the mounts to fit the 32shell.