Hum. FMGV S2046 is for 96-03 forks... But then 04-05 are very similiar forks, so it's perfectly reasonable that the kit would work properly, and the extra length would generally be a plus. So it could be that it's ideal for the job. If he's telling you it was designed specifically for the SV, that's a wee fib
But I don't think it's any real reason for concern.
"A GSXR shock revalve" is also a wee white lie, there were quite a few different cases with an assortment of defects, but you can't fault them for that really, can't expect them to fall on their own swords.
So this is all quite encouraging. Allegedly my forks will arrive this week, though the UK postal service was on strike for the last few days so it'll be delayed, I'll check it out once I have them just to give a second eyeball on top of Ben's. It'd also make sense to speak to Robw, he actually knows about this stuff whereas I'm just bluffing
I have to say that if it was me, I'd still get them checked over though. But I'm pretty biased to be fair.