Front Hub Swap

[dajja]

I have a 1954 Chevy Truck 3100, front and rear 6 lug, I am converting to automatic transmission, and 5 lug rear end, already have the rear end with the 5 lugs, and for the front i was planing to use the ones that came from a 1955 Chevy car Bel Air, removed the 6 lugs and all the ball bearing, but the inner ball bearing on the 5 lug hub does not fit on the spindle, and here come my questions: Is this swap possible?, the 55 bail baring almost fit (have not take any measurements yet) the ball bearing on the truck is a 909602 (can't find the interior dimension) and the one on the 55 is B40 (3 inch), what should be the ball bearing I need.