How do you tell if you have 202 heads without having to remove them ? ?

Question

It's a 1966 327 and not sure of the heads, I don't want to take them off and measure, any one know what the markings should be on the outside of the head.

Answer 1

double humps on front of head.

Answer 2

My all stock '65 SS impala came with the 327-pg. The 4-bl engine supplied a.c., p.s., auto trans and sport guages and console shift. The clear 'HD' block stamp ,on the engine, proved a solid 300hp engine. '66 is clearly a free-for-all in chevy apps. To not take .05 cent pictures of the factory build before dissasembling (in the spirit of salvation) is beyond what most purists consider the minimal actions required to fully preserve what is considered Holy! You really need to re-asses what you hold and re-address the direction of your question.