The Intel TX chipset was one of the best for Socket 7, so you're good there. Since it supports the K6, it will probably work with a K6-2. And since it gives the setting for 75 MHz frontside bus, you could probably run a K6-2 at 450 MHz (6x75). Depending on the type of voltage regulator used, you might need to provide extra cooling to it (the voltage regulator) with a CPU that fast.

There may be an undocumented setting for 83 MHz FSB, which would allow for a 500 MHz CPU. It's also possible the board would work with a K6-2+, which would bring a host of benefits. See Oldie Tuning for more details: https://www.tomshardware.com/reviews/oldie-tuning,216.html

The board in that article worked with the plus series CPU with the original BIOS from Asus, but that can be hit and miss - some Socket 7 motherboards worked with them even without BIOS support, others wouldn't even POST, so you'd be taking a chance there.

Ideally you'd have a BIOS patched to support both a K6-2+ and larger hard drives, but there doesn't seem to be one available for download. There is a thread on that very subject: DIY Bios Modding guide Jan Steunebrink k6-2+/3+ 128gb

I have an Asus TXP4 (same chipset) with a K6-3+ 450 @ 500 MHz, 256 megs of SDRAM, and a SIL 3114 PCI SATA controller with a 120 gigabyte SSD running windows 98.

And that vintage computer hardware store sounds like a great place! I wish there was something like that here.