i'm getting ready to convert my '81 F100 with 5on4.5" BP to the 5on5.5" BP.

question 1: will my calipers work, or do i need the calipers from the donor truck?

question 2: I havent been able to find any specs on the wheels that are on the donor truck, i havent seen any pics of them up until 2 min ago in another thread on this forum.



so this pic leads me to believe they were a factory wheel offering for 80-61 trucks, is this correct?

Thanks!