Will a steering gear case with the short stop pin groove work in place of the one with the long groove?
Did you get another car?
Generally best not to mix the cases, the short groove is for the 4:1 gears, the longer for the 5:1 gears.
Seems that a lost of arc for front wheel turning would occur using 5:1 gears and steering shaft in the earlier short groove case.
In theory, the arc of pitman arm travel should be the same. The pitman arm and steering knuckle geometry is the same regardless of the steering gear ratio. So the arc of travel at the front axle should be identical regardless of whether it is 4:1 or 5:1 gears.
But, with the larger steering wheel that accompanies the 5:1 gears, I would want the longer arc inside the gear box to make sure that I rarely or never have the gear stop pin hitting the end of the arc. I am thinking this might be the cause of the cracks I have found in several steering gear tubes.
I have wondered for a long time why the change in the length of the slot for the later case? As far as the steering geometry goes, they should not have needed a change. However, I have seen quite a few of the shorter slots that have been forcibly worn extra long. Perhaps it was just slightly too restrictive?
There appears to be a slightly different cut on the teeth in the gear case between the 4:1 and 5:1 cases. The 5:1 gears and shaft will fit into the 4:1 case, however, in some cases the gears will bind a bit. Some people have used Timesaver to lap the gear teeth in with good results. Sometimes, (perhaps if the earlier case is already a bit worn) the 5:1 gears slip in and work just fine without any additional effort.
Drive carefully, and enjoy, W2
Would you need a longer arc for balloon tires vs 30X3-1/2 clinchers .???. The only difference I can see the longer arc would make is the turning radius of the wheels. Longer arc would mean sharper turning and shorter arc would give a larger turn radius. I believe the 5 to 1 came about because of the 21 inch balloon tires but unsure of that. ... Ive also wondered if the 5to1 is really necessary when running 30X3-1/2 clincher tires. I have had 3 cars with the 4to1 and clinchers. For "me" the steering was "quicker" but not really that hard. I now have a 27 touring with 5to1 and 21 inch wire wheels. The steering is a little "slower" but not really that much easier. But it may be the "drag" of the extra rubber on the ground with the 21 inch tires that makes it seem "to me" that it is no easier than 4to1 ratio (with clinchers). It may be that a 5to1 ratio with 30X3-1/2 clinchers will be "slower" but "easier" ????