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

Dr. Diff has lots of options and is highly recommended. If you want to do the DIY method, going to the 73+ front disc setup gets you the 4.5" bolt pattern and good stopping power. For the rear and, an 8.75 is nice and has the most options but they tend to be quite pricey. For your intended use an 8.25 would fit the bill much more affordably and is plenty strong. The drums in the rear are certainly sufficient unless you are doing something severe like autocrossing.

Hah! Treed by the professor!