I'm running the Lares 807 fast ratio box, which is a reman original. The first one was a bum as it had too much preload, but the replacement was dead nuts and works great. IIRC, shipping the core back cost me under $20.
https://www.rockauto.com/en/moreinfo.php?pk=3025032&cc=1132692&pt=7416&jsn=1025
You can get a new quick ratio under the Lares brand, which has a lifetime warranty. I'd bet it's the same box everyone else is selling for more money and with less warranty.
https://www.rockauto.com/en/moreinfo.php?pk=12868357&cc=1132692&pt=7416&jsn=1028&jsn=1028
The Borgeson box is hit or miss. I've heard reports that it doesn't play nice with the factory Ford pump, so there's another investment you need to make, along with hoses.
Current RockAuto 5% discount code if you buy from them, good 'til 3/31 --> 225427778202750698