"Jet smooth Chevrolet ride"
I saw in another post where a few guys were commenting on the handling of our beloved old Impalas. After owning several cars over the years, I accquired a 70 LS5 convertible in 1995. The "jet smooth ride" (and lack of handling) just amazed me. One thing in particular that annoyed me was the old slow steering box. Trying to PARK this monster in a parking lot, I'd almost always miss the hole. I came across a 78 WS6 Trans Am in a junk yard and swapped out the steering box in my Impala. Viola! It seems I had gotten used to the quicker steering in the newer cars and now I was able to speed up the ratio in my Impala (making it easier to park). The T/A box was a perfect bolt in deal. You need to switch the steering arm (obviously) and 78 is the last year that GM used standard thread steering hose fittings. Looking at it, you can't see a difference from the original box. From what I understand now, several "restoration parts houses" are selling fast ratio boxes. This is a good idea if you plan on driving your car on a regular basis.