Looking for options to do a 4” to 4.5” bolt pattern swap all around and brakes.

I have a stock '68 Barracuda Convertible V8. Looking to the group for some build and replacement options (and price-saving).
Good examples, stay away from, or pitfalls. Don't do's.

- 7.25 rear
- Disk conversion or stay drum out back

Reasons: Updated stopping/safety and some wheel options for a nice street cruiser with a bit of upcoming HP upgrades.

(Not interested in QA1 prices or parts. This is not the car (or my wallet ;) for those types of upgrades)