If you're thinking GN instead of TTA, do it and take good pics. I wouldn't mind doing it to my T-type, but don't really plan on it at present. I am planning a manual box conversion but a rack would sure be nice.
easiest rack we found that worked good was a manual rack for a fox body mustang.
used 2 by 2 box tube of the front of the crossmember and made caps for the ends at the right angle to get the steering shaft inline were you want it and welded nuts to the back of the caps ...the rack comes with bushings so you can bolt it right up.
the first couple we had the shaft sticking up pretty strait to not cut into the crossmember and used universals to make the turns
the last one i cut a hole in the front of the cross member for the shaft to stick in and cut a hole in the top for the shaft to go thru.
you can buy the swivels to fit on the splines of the rack and put one at the bottom af the colum and add a shaft.
must be aware that this rack dont alow for real sharp turns and can be trickiy on u-turns.
i am consitering doing it on my elcamino i have now that my i/c motor is going in..
heck i just got a dig cam at christmas
one of the guys that had one of the cars might have some pics i can check ... i'll email him shold know tomarrow but i dought he does he's like me gets rid of stuff without getting pics then regretting it later.