About the best prices I've seen for master engine kits are here:
www.northernautoparts.com
I've never used them, but they seem to use brand name parts.
As far as stock bridges, they will handle about a .500" lift max. At about the same time, you'll have to start checking coil bind on the valve springs and spring retainer to valve seal clearance.
I've never seen a single groove water pump pulley. You need at least 2 grooves if you run PS, almost a necessity with a lifted, big tired Jeep.
Bob
tufcj