Is there visable markings to identify a 5.0 from a5.0 ho?

The high output version of the 302 was first available in 1982 and featured a double-roller timing chain and performance camshaft. The commonly referred to h.o. engines are in the 1987-1993 mustangs such as my own. They are visibly labeled 5.0 H.O. on the intake cover. If the engine or car is a v-8 from those years there is no non-h.o..