Converting Burnham V8 to propane?

Back again with an oil to propane question. With the unrest and uncertainty in the Middle East, my main concern is the availability (and price) of the base fuel.

I'm now aware there are propane conversion "kits" available, to convert various existing units from oil to propane. Beckett CG4001 and Beckett CG4MUF3 are what I found.

In my case the entire "burner" assembly and "air tube" get replaced. Cost of the units seem reasonable, but no idea how much it will cost to calibrate things. Or if the town building inspector will peek in.

Given that the existing boiler is some 20 years old, is it sensible to consider conversion, or rather replace the unit? In terms of efficiency, the latter seems wise, but in terms of cost, labor AND the ability to go back to oil if conditions change, make the former attractive.

Thanks for your kind advice.