Welcome to the Stovebolt.
I put a '51 front axle and a '58 rear with a 3.90 gear in my '38. I changed my motor to a '55 GMC 270.
Your choice should be fine.
I see you are in Kansas, keep the reunion in mind for the 1st weekend after Labor Day.
Last edited by Wayne67vert; 01/31/2018 9:34 PM.