The lever arm bolt dia and on-center are interchangeable between the "Long" and "Hurst" Shifter brands.
Richmond bought the Doug Nash trannies a few years ago. They recommend the Long Shifters as does G-Force (tweaked internals).
I saw a note on Hurst website on the 4070015 kit. Warning it won't fit if you have 4 shifter rods.
Hurst 4 Speed Race / Richmond 5 Speed Shifters - Hurst Shifters Online
Replacement arms of various shapes start on page 58.
http://www.hurst-shifters.com/wp-con...al_website.pdf
The Long (3 rod) kit is pretty much the same price as the Hurst.
https://www.summitracing.com/parts/lon-hn1000/overview/
https://www.gforcetransmissions.com/...peed_Trans.pdf