I've only done the R&P conversion on my '38 Chrysler, so YMMV:

I did find myself making more 3-point turns than I used to, but I was able to find some different steering arms (early Dodge truck maybe)that were an inch or so shorter but had the same mounting bolt locations as my original arms. That got me back a good bit of the turning radius I'd lost.

I'll bet a clever guy could work out shorter steering arms for the later cars if the turning radius bothers you, but lots of people seem to find it livable without doing that though.