Cast iron holley intake and carb on the 66. Q-jet and iron q-jet intake on the 67. The true 360 hp most were 4-bolt blocks. They used the 962 block for both 360 & 375 hp Chevelles in 66. Also open air cleaner on the 66 not sure on the 67 Chevelle. The 66 961 block was for the 2-bolt motors. The 67 used a 406 block for both the 375 & 350 hp one was 4-bolt & the other 2-bolt. Hope this helps.
