Hello and welcome badgas

Thank you for your post ,it made me start thinking. When you said you had an EAA block I thought, WOW.... I've got one too. Mine came out of a 56 F600 I got for parts ( and to use building a barn) over 20 years ago. All this time I assumed the 56 had a 223 engine in it . To be sure I went and checked the bore size and low and behold it is a 215. I guess you can never assume anything with these old trucks. I am sure it didn't come from the factory with it but than again why would someone switch the original 6 cyl out for a smaller one? This is the same truck that had 5 lug wheels on the front and 6 lug on the rear with a 2 speed axle. If only the old girls could talk.

Louie