"High Performance" VIN ID

pessimistic regarding the 400 I am. I hope it proves me wrong!
I have a 77' with all the police options, and 400 four barrel. Basically the non lean burn had dual exhaust and no lean burn, and more power, TQ9054, @ 240HP according to the Chrysler book. The N code was the lean burn single exhaust.The 77' lean burn sucked, at 190HP, TQ9064, and TQ9097 in the Town and country. There was no difference otherwise that I can see.By 1977 the Dual exhaust option was gone. The lean burn showed up mostly in California first. Which is why the yearly production numbers don't jive. California engines sucked period, and they bled over to the other 48 states. They had the same compression ratio, and cam. in reality these engines could hardly find 7:7.1 actual compression. I'm tossing that junk out. I am Installing the hardened seat 67' closed chamber 915 heads, and Edelbrock aluminum Intake, RV cam. Reliable AFB carb. &)' roadrunner dual exhaust, and electronic ignition. My Brothers ran like a raped ape after these changes. I have the 9 1/4 3:21 limited slip, heavy duty tow pkg, heavy duty transmission, with heavy springs, 11" brakes. Trans cooler and P.S. cooler. if I'm not happy, a 67' HP 440 will wind up in the Cordoba. it is a great car!

Just my view of a potentially great 70's B body!