Matt,
Would you share the part info/ID's on what you used???
Thanks!

I had the rod ends laying around from another project, but these are they:
https://www.summitracing.com/parts/fkb-jmx10tThey use 5/8-18 threads and have a 5/8" diameter hole in the ball. They come in both left and right-hand threads, so you'll need one of each to make your drag link adjustable. Be sure to check the description so you get the correct threads.
I used a 10-inch swedge tube:
https://www.summitracing.com/parts/aaf-all57164The swedge tube has 5/8-18 threads at both ends, one left-hand and one right-hand, so the ends thread right in and it's adjustable by simply turning the tube.
I also used jam nuts in both left- and right-hand threads. These secure the swedge tube so it can't turn once you've set it:
https://www.summitracing.com/parts/qa1-jnr10shttps://www.summitracing.com/parts/qa1-jnl10sAnd, of course, safety washers so if the rod end fails, it doesn't pop off:
https://www.summitracing.com/parts/mez-sw58aYou can source the 5/8" nuts and bolts locally. I used grade-8 nylock nuts but you can also use castle nuts if you drill a cotter pin hole through the bolt. I used 2.5-inch grade-8 bolts, but I think I'm going to take it apart and use 3-inch bolts with another safety washer on the other side of the rod end. It's not going to come apart, but that's the right way to do it.
Hope this helps!