Whats the easiest way to identify an engine??

jstang209

20+ Year Stangneter :roc</strong><span class=
Jun 3, 2004
640
2
18
Stockton 209
i got the v8 in my shed.. its a GM/Chevy im sure bc the way the exhaust ports are.. theres numbers all over it. but i dont know what to do with them.. i got the firing order off of it.. but all the gm firing orders are the same for the v8s.. someone help me out plz thanks