Questions . . . Re-jetting Carburetor for Altitude

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PATRIOT

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My Nissan NS15B came stock with a #108 main carburetor jet which is rated for elevation at sea level.
I'm headed for a lake at 7500' elevation and need to re-jet for this.
Here is a list of the jets from Nissan and their associated elevation rating but they aren't all available any longer.

#108 0' Sea Level (Stock Size)
#107 1641'
#106 3281'
#104 4922'
#103 6562' (938' under target elevation of 7500')
#102 8203' (703' over target elevation of 7500')
#101 8859'
#100 9843'

Does anyone know if the dimension of a jet is built into the jet number?
In my case, would a #108 be a 1.08mm jet size?
If so, it appears I may need a #102 or #103 (not sure which one) and as long as the mounting thread size was the same, could any other manufacturer's jets be made to work?
 
No jets available from the dealer . . . trying to find what else my TK carburetor 55A might fit as it's a funky main jet that also holds on the fuel bowl.
 

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you could buy another jet and drill it out to the size you need. you should be able to find the diameter listed somewhere with what size drill bit to use. i had a book with the Holley jet sizes and which bits to use when i was helping my buddy with his dirt track car.
 

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