Id look into flipping your tierod so it comes in from the top, you will have to drill our your knuckles, cut off the factory sway bar brackets, and raise the axle end track bar bracket but it will give you flatter drag link, and about 3in more clearance under your tierod. Or you coudl get the teraflex High steer knuckle for PS knuckle to get a flat draglink.
If you choose to drillout your knuckles why not just convert to LARGE 1ton tierod ends. 7/8-18 threads.
ES2027L $18.99 high misalignment drag link end Passenger side 7/8"-18 about 7in long with 3in of threads, BIG taper
ES2026R $20.99 high misalignment drag link Pitman arm side end Are 7/8"-18 about 7in long with 3in of threads, BIG taper
ES2234R $23.99 Shorter then the drag links, driver side tie rod 7/8"-18
Application: 85 Blazer
ES2233L $25.99 pass side tie rod 7/8"-18 WITH HOLE FOR DRAG LINK, for T-geometry steering.
Application: 85 Blazer
Then just get some 1.24in DOM tube threaded to 7/8-18. It woudl be better and should cost less then OEM kinda stuf your looking at. Drilling out the pittman arm is a chore though. I needed a carbide bit for that.
There are lost of options.