Why mix stain/tint with BLO? Stain is usually a dye or pigment of small particle size dissolved or suspended in a low viscosity solvent. The idea is to promote deep and rapid absorption into wood via the solvent, which carries the pigment or dye along with it. Remember that properly applied BLO is not a surface finish, but is absorbed into the wood.
Tinted BLO would require numerous applications to get proper absorption, and would be hindered by the fact that, as BLO crosslinks when exposed to oxygen and polymerizes, it seals the wood to the point where subsequent absorption will be impeded. Spot matching an old finish color, especially if a darker color, will prove difficult.
Stick to established procedures of stain or dye first, then finish.
OTOH, if you're using a surface finish such as lacquer or shellac, tint would be workable, but an inappropriate material for refurbing oil-finished wood.
If you're going to strip an already ruined finish & start over, use a stain to try to match the original color. Finish with BLO, keeping in mind that the color will darken some after applying BLO.
Best thing to do is ask around to find out what the original Ross finish was. If it was an aged yellow surface finish, it may have been some kind of varnish, which yellows with little provocation anyway.