292 engines have the 6 inch side covers, fuel pump in the middle, taller spacing between the water pump and head, and also a bypass water hose.
250 engines have 4 inch side covers, fuel pump right behind the distributor, very little spacing between the head and water pump.
230 engines are the exact same as a 250 except the 230 has flat top pistons and a shorter stroke. Only way to tell the difference between a 230 and 250 is looking at the pistons. 250 will have dish, and 230 will be flat top. The one pictured in the blue truck is a 292...one dead give away is the Green color. The 230 and 250's were blue.
