stick with 114 LSA
I just swapped cams without any other changes on a 347. I had surging idle, lopey idle, poor throttle response, low idle vacuum using all stock '93 mustang EFI......
FROM: 210 / 218 @ .050, .480 / .500, 112 LSA
TO : 206 / 212 @ .050, .480 / .480, 114 LSA
The engine is completely different now. Rock solid idle, snappy throttle and it is much easier to drive smoothly in traffic with a 5speed. I can drive twisty mountain roads and leave it in 4th all day. Unless you plan to run over 4500 rpm frequently, I'd stick with stock or nearly stock. My new cam is the smallest hyd. roller that Comp makes. XE258-HR-14.
With tuning work mustang guys can get much more agressive cams to work, but it's a lot of time / money for a lopey idle and high rpm power.