I would swap the Ford 9" rear but not the front 44. The early Bronco 44's have a drivers side drop and your dana 30 is passeneger side. Front 44's from a Chevy, 80's and up FSJ's, and Scouts are passenger side drop and a better candidadte for a CJ in my experience.
With light to moderate trail use, you should be fine on your dana 30 with 34's. If you plan to wheel pretty hard and beat on it, a front 44 would be a better choice for sure.
1983 CJ-7 Laredo Jasper 258, Clifford intake/hedder, MC2100, HEI, MSD digital 6al. Warner T5, Dana 300, Dana 30/Ford 8.8 SOA, 33x12.50 Goodyear MTR
1999 XJ Cherokee Classic
2001 XJ Cherokee Limited