That is low.
I made 260rwhp with AFR 165's, stock cam, 1.7 RR's, and BBK intake.
with X cam you should be more than that for sure.
AFR 185's are waste for a 302ci, dont need 185's till you stroke it or blow it.
What is base timing at?
Was this a "Mustang Dyno"? cause they do read...