We bought a 76 hardtop as a cruiser for those times when the club goes on longer rides and in not so great weather (our other car is a 71 convertible). I'm tired of wobbling around corners with overall shitty performance so I ordered new rear trailing arms (upper & lower) along with new sway bars and performance shocks to start with the suspension. I'm also thinking about adding a Detroit Truetrac to the rear end and upgrading to a 200r4 4-speed automatic to help out with the highway gas milage and give me a little umpf off the line. Seems like a good choice since it will fit right in place of the 350 and is still a mechanical transmission. This will lead to eventually rebuilding the engine or dropping a crate motor under the hood. I am slightly confused about a proper rear end gear ratio for the stock 10 bolt under these parameters. I don't think I want to go any lower than a 3.23:1 or I run the chance of bogging the engine down at the lower rpm's at highway speed but some of what I have read suggests that a 3.23:1 would be way to aggressive for this type of driving and would suggest something like a 3.08:1. I still want some quickness coming off the line and am running stock size tires on 15 inch rims. Any advise from people who have been here and what your experience was would be most appreciated.