I am having to replace my 1984 3.8L OMC engine model number [FONT="]382STMRCRJ with what appears to be a 1981 3.8L OMC with model number [/FONT][FONT="]170STMRCIS[/FONT][FONT="] and would like to know if there is anything special to be aware of from a mounting perspective. The replacement engine is a complete engine fully sealed with carb, cooling jackets, manifolds etc. ready to be dropped in. Thanks for any insight they may not be obvious.[/FONT][FONT="][/FONT]