Manual steering box brand

I’m going to swap my 73 Scamp over to manual steering and have decided on the 24:1 box. My question is, I can’t decide where to buy, should I get a new box from rock auto ($282) and the Mancini adapter ($132), or buy the PST kit that comes with adapter ($435)? I’m definitely under a budget but I just wonder which box will be better quality? Thank you.