Alright, so you have an additional line to install (not just replacement of the current fuel filter/regulator). Fair enough.
I can't seem to find a crank pulley upgrade on Needswings without buying the complete set with PSK and such. I guess @NeedsWings removed if from the website? > https://www.needswings.com/asp-178mm-kit-psk178
I have not bought a new/upgraded fuelpump (yet).
The AFR gauge pricing was based of Needswings' set:
https://www.needswings.com/zeitronix...and-controller 272 + 124 (boost/vac sensor) + 4 (o2 bung) + 27 (wireloom kit, because nice)

I see your edited post, so this is just an more aftermarket AFR sensor I suppose? More info on what you've got?