For length the cookie cutter answer is 32", but I'd recommend you do a mock up to verify that that works for all of the other factors you're working with. With your height you are likely putting the seat as far back as you can, so a 34 might be better.........or not. Dished wheel or flat? Makes a difference. People are built differently from one another. Some are longer in the leg, others in the torso, even though overall they may be the same height. Makes a difference. It comes down you your personal comfort.

Mock in the seat as close to where and how high it will sit (including accounting for cushion compression). I like to use a broom handle or similar dowel, though a length of conduit or pipe would work too. Depending on your steering box type and location longer or shorter may work, and if you need two or three universals to clear engine stuff and whatever else.

If you use a mock up column/wheel combo you can account for all those variables and more (including belly if appropriate).

Limeworks is quality goods, and Steve will give you all the help you need to install it correctly.