A kit like the POL kit for 3/4T 60-62 front disc is, of course, strong enough for 3/4. It is 6 lug. It may be possible to redrill the 8 lug pattern onto the rotor if there is enough space...or is there a 72 and up 8 lug rotor that will fit the kit?
If that idea or an idea near that, does not work, possibly buy the 6 lug front kit and install a 1/2T 60-? trailing arm style rear diff.
Keep in mind when thinking about how to fab something that works, it's just a bracket that utilized existing bolt holes to hold 1972-up calipers, a rotor with a bearing set that fits your spindle and has 8 pressed in lugs. Not to oversimplify it, but to put it in perspective. If you can buy and modify or use donor parts, you can get it done. I say this, keeping in mind some have looked for 8 years! There has to be a way that's not real expensive.
The other option is a 73-86? front suspension swap. Maybe 63-86. Yours bolts off and the donor bolts on, with only two holes to drill. A lot of grunt work and heavy lifting but done by many and there are video/pics of the whole job online. If you want to stay with torsion bar, then this is not your option. I don't know if this option is the same procedure for 3/4 as it is for 1/2 T. The newer donor swap can give A-arm/coil suspension, free disc brakes and free power steering all in one swap.
