I got the small ultrasonic cleaner.
since acetone was the only thing to cut the tar, I may fill it up with that.
And yes, they recommend doing 1 carb at a time.
mixing known good assemblies together may result in non functioning ones.
They are only slightly different, left side have drain plugs on the left side and vice versa.
Probably only going to take them apart enough to change all the seals and clean the ports and passages.
The headlight shell was busted so I took that off. What a mess of wiring inside. But all the wiring has the same coloring on both sides of the connectors. So it was pretty simple getting it back together. lights work, signals work, gages light up, starter works.
1st mod already done, a savage battery fits.