I can't go 8spd... My rear hub (FH-1051) can only take seven. Shimano. The whole bike was with shimano components, now it has campy brifters and RD-s. Works perfectly, like a charm. And my brifters were practically NOS, they're banging across seven speed shimano cassettes without glitches, and they were cheaper than old shimano brifters.
And I'M yet to see any of those old RX-100 or RSX STI levers to be in good condition. These Mirage shifters were practically newly built with new levers, hoods, perfect working.
Next step will be to put some dual pivot caliper brakes on the bike. Even though it can sprint uphill easily, accelerates and turns well, with agility, it lacks braking power. Yes, I've changed the cables -housing and the brake pads as well, they still like shit.
The old weinmann vanquier calipers have much more capability