198ci

OK besides all the technical stuff, (I know of a few examples) is there ANY "visual" ways besides the block coding, to know which slant 6 is a 170, 198, or the 225? I ask as I know of a few locations of the block not able to "look" for casting numbers and was wondering if there is an easy way to determine what one is which CID????

My Step-Son lives across the street from such a place out ion the sticks, and i mean the skeeters are strong enough to carry you right the hell off! They're in cars, and trucks kind of like those found "Cars left for Dead" sort of deal trees and undergrowth grown up all around difficult to get too, etc....This is why I'm looking for a "visual" way if any exist! The deals on the valve covers or air cleaners are all non-existant!