Hi All, I've got some questions about a 1977 400CID engine. I am pretty familiar with the 383B and 440RB engine, but the 400B is fairly new to me. Where can I find the engine number/VIN on a 1977 400 engine from a Chrysler Newport? I tried looking on the flat surface just above the oil pan on the passenger side. It has the flat surface but it didn't look like it ever had any numbers on it. Are there other places to look? What are the differences between a 1977 400 engine and a 1968 383 engine? - I know that the 400 pistons are different (bigger bore) but everything else in the engine is the same as 383? (cast crank instead of steel but same otherwise) - If I understood correctly the harmonic damper and torque converter are different. Externally balanced on the 400 because of a cast crank, internally balanced steel crank on the 383. - The motormount ears on the 400 are a little thicker than the 383 so the ears won't break off. The reason asking. As some of you know, I need a lot of money to get my 383 up and running again which is not in budget for the forseeable future. I looked at temporary options but they are slim in my area. Until last weekend. I found a 400CID engine in decent shape. It's all complete in one piece with carb, ignition, fan, air cleaner, manifolds, torque converter, TF727 transmission etc. The price was good enough to take a look. For my understanding the 1968 383 and 1977 400 are the same externally. Would I be able to drop in the 400 without any issues instead of the 383? (keeping the TQ in mind because of the balancing) Ofcourse with some cleaning, new plugs, oil etc I already have a new ignition system and a edelbrock dual plane intake with an edelbrock 1406 600CFM carb which I can use to replace the lean burn system.