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@edscoble
There's a topic covering stuck seatpost, soda usually work for that.
a chainring that's inbetween the small and big chainring you have on your bike would be idea, you can keep the current BB, but it would be idea to move the cranks closer to get the chainring in the middle of the 5 speeds block, find out what BCD it is, I assumed it's 130BCD since it's a road crankset from the look of it, it should be written on the chainring.
don't forget to specced the thickness to 3/32, they're the thickness of the chain, 3/32 is coming on road bike with derailleur, whether 1/8th is common on fixed/singlespeed set-up.