PST steering

also consider 16:1
if you run 70r15 (or14) 205 fronts its not a problem
if you run big wide fronts it might be

20:1 was standard manual ratio for just about all "Not sold in America" manual steer A bodies
obviously this was in the days of standard wheels and standard width cross ply tyres.

a 16:1 is heavy with wide front radial tyres but sensible ride height, and some, not loads, of positive castor its ok at all but parking speeds....gives you a bit of a work out if you try to drive at 1 -2mph and swing the wheels lock to lock

I felt the move from 20:1 to 16:1 was great i'd expect the same level of JOY moving from 24:1 to 20:1

20:1 will probably be perfect but 16:1 is not too much in a smaller lighter car

Barracudas exported to europe 67/68/69, if they were manual steer had 20:1, thicker torsion bars and the 4 pot brakes. Someone at Chrylser recognized we had a few more corners to drive round getting from A to B out in the country. Most of us, if we try hard enough can drive 20 minutes from the city and find ourselves on a single track, grade B or C road, with blind 90* corners and adverse camber, fewer turns of the steering wheel certainly helps.

Dave