fisherboys

I'm trying to mount the radiator directly behind cab horizontal right above the rear frame rails. I was wondering what I could do with the steam vent lines in the heads. I'm running two 1 1/2 lines to engine and then the other back from engine to radiator. I was going to tie the vents together and run them out the back down along the bellhousing and into 1 1/2 line going from engine to radiator, would this work correctly? the radiator will be about 12-15 inches below the top of heads. Any ideas thoughts, input would be appreciated. Side view shows elevation difference. Thanks Mark