road car cam for my 318

That's an increase but not by much. If you are class racing, it may make a slight difference. Street, street strip, or Et racing. no big whoop.
If you are looking for mpgs its alot
my comp 268 110 lsa vs 340 cam 114 is night and day
Hi comp motors are more efficient all else being equal with 8.51 to 1 a lower lsa will pump up the psi and help all the way around.
108 will give more chop 110 is good