The stock later VW steering shaft with the collapsible end is 37", the ones just before the collapsible section was added are a smidge shorter, the early style is 39". Enough of the length adjustment can be taken up in the bracket/coupler and steering wheel/column positioning that cutting the shaft isn't always necessary. If the wheel wobbles too much side to side at the steering head, check to see that the corrugated metal spacer/collar is in place. On the older columns it was a nylon collar that the metal steering wheel center section slid into. A small amount of bend in the shaft isn't the end of the world and you ought to be able to straighten it easily, it's made of mild steel tubing.
If you end up shortening/lengthening another steering shaft, do it with a length of pipe inside the shaft. Drill holes and plug weld it. If you use double flex couplers and a short connector, make sure that you have a second bushing or support bearing at the bottom of the column. The shaft is unsupported at that end. You're only allowed a single coupler or swivel u-joint with an unsupported shaft.
All of this is Easy Peasy, really.
Luck,
TC
Oh! And one more VERY important tip ! ! ! If you end up buying a steering coupler, DON'T buy it here:
http://www.pelicanparts.com/catalog/shopcart/356M/POR_356M_SUSstr_pg1.htm
Scroll down and click on the "Steering Coupler" image/listing. Check out the VW molded in logo and part number, now check out the $105.00 price tag ! ! ! ! !
No lie, $105.00 for a VW piece that sells for anywhere from five to twenty dollars from any of the vendors on TheSamba.