Need Help w/stock rims

[Hutch]

To go back to stock 15 in rims you will need to switch the front to a 71 72 5 lug disc brake spindles and rotors. It may be easier to get a whole crossmember to switch out with your current one. Then the 15 in rims in the front will need to be also from a 71 or 72 To clear the disc. Calipers you can identify the stock 15 in rims for a disc brake truck as the ones with four nubs to hold the hubcap on the earlier drum brake wheels only have three nubs.
You can do a search on the forum to find a lot of info on this subjct as it can be pretty confusing. You really need to have the same lug pattern on the front and rear so you will be able to carry one spare tire to fit all four corners.