Factory hydraulic roller LA cam advice

Couple of thoughts, that cam will want more gear than 3.23 but it will work. The lift is too much for a stock 308 head because of retainer to guide clearance but any competent machine shop can handle that. You can also buy a tool and do it at home. You “can” use factory rockers but being non adjustable you better be damn good at measuring pushrod length to get the preload set correctly. Better idea is to use aftermarket adjustable roller rockers. You can use your factory roller lifters without issue, just disassemble and clean them. Last thought, if this is your first engine build learn to degree the cam now and it will save you on every engine you build from here on out. Do not assemble it until the cam is right! Good luck and let us know how it goes.