Newbie needs help converting an NG Stove Top to Propane. What size orifice?

[Les Newcomer]

Be gentle, I'm a newcomer here and this is my first post.

--->I really did search the forums on this subject, but couldn't find my answer, or the links to other threads were old and broken<----- So here goes...

I recently purchased a No. 202 stove top  (made by LaSalle of Wyandotte, Mich) that needs some help in the fluid mechanics department.
As shown in the photos, the left burner burns very yellow with lots of soot and I don't dare open the cock up more than 1/4 turn. The right burner burns blue, but is still getting too much gas as the flame lifts off the burners quite a bit at a quarter turn.  Closing the air shutter on the left/yellow burner, turns down the flame but increases the smoke--which is what I would expect.
All of this with a new (Amazon) that specs at 11" of water and rated for 95,000Btu.

In disassembling the burners I noticed the yellow flame burner has an orifice of drill No.43 (0.089") and the blue flame has an orifice of No.55 (0.055")

I think these are still too big, (does anybody know why there would be two sizes?) The question now is what size orifice do I need?  The internet can answer that if I knew the BTU/hr rating or the cubic feet per minute rating, but finding that info about a 100 year old stove top is nigh impossible. Which is why I'm here.

While it's not a Griswold, the burners sure seem to have the same shape and size as a Griswold No.202 So I hope somebody can help me.π

[Craig Allison]

Do you have a local propane company? If so, they can probably give you solid answers.
That's what I did with my Griswold 202. They set me on the right track.

And welcome to WAGS.

[Les Newcomer]

Nope. All of the propane around the Detroit area is sold through Home Depot/big-box stores and some smaller hardware stores and even a hobby store. I doubt anybody around here knows you can have a kitchen stove on propane (let alone a refrigerator) and to come in with a 100 year old stove would get me blank stares.

[Duke Gilleland]

You might try a R V facility. Am sure that they would have connection with somebody who does repairs. The first one that comes to mind is KOA which is nation wide.