Radiator choices 26" or 22"

Haven't had it on any dyno yet to be sure how much power it is making. But going by bench build numbers and reading articles where very similar builds I would guesstimate being in the 400-500 range. Currently the car is shelled out with only a driver seat in it. I would like to see how much of the interior I can fit back into it. To give it a complete look.