Good to see you here on Cruiserlog. For the benefit of our other members--I've seen the pics of your stove before and will refer to them in this discussion.
Perhaps whoever did the modifications was really good with the rivet tool
More seriously, I have the same model Taylor 030 stove as you and I must note that there are very few holes required for the kerosene system.
It would be quite easy for those to be used for the propane system as well (plus a few little rivets?) While the stove may work wonderfully with propane, I wouldn't worry if I were you about doing a convert to kero since you're not changing it away from what it was built as, IMHO.
I just reviewed the photos and note that the style of knob is really and truly not from Taylors, the method of securing the burners to a bracket where the kero fuel line comes in normally is clever to reuse holes but is secured with what looks like high strength hex bolts isn't what I'd expect from Taylors; similarly the between the knob and the stove frame there are two little Phillips or Roberts head screws to secure a plate. Everything else on your stove is slotted head it seems.
Finally, cinching it for me at least: the front of your oven door says Taylors Para-Fin on it. Paraffin being the UK term for Kerosene, I'd think that at least the door is from a Kero stove.
Having said that--I've seen a pic of an older version of a Taylors gas stove and it looked much more like the model 030 than the new gas stoves model 41 and 43. I cannot find that pic on line anywhere now. Go figure
If I were to keep the stove as gas rather than convert back to kero (and I wouldn't because I don't like propane, I prefer kero) , the only worry that I might have would regard the source of the burners and whether they are appropriate for the marine environment. From the looks of them, they are similar to the very, very old shipmate gas burners (pre WWII) which were difficult to keep lit and somewhat undesirable compared to the modern gas burners that you could have on a boat stove today. Further, that oven has a heat shield between the burner and the oven itself. If the gas burner is too high of BTU, the shield will not be proper for the use of the burner. So--you might wish to investigate the propane burners you've got for a bit to figure out if you've got a stove set up that you'd like to work with.
Finally, I'd suggest that you get a carbon monoxide detector and use it no matter what you do.