Nice! I'm not quite the opinion here on the forum - there is a lot of other guys and gals who know a ton more.
Only remove the boxes if you plan on keeping the carburetors. I can see your wires are clipped for the tors boxes - which is fine. That means the electronics for it are unplugged and you won't have a problem with it not sparking!
You can buy the tors eliminator kit to do the whole shebang for around $50 (before shipping, maybe after if you shop)
It requires you using a new throttle cable and they give you new screw caps. After that you lose some carburetor adjustment so with the kit comes a tap and an throttle stop screw ( idle screw ) You tap the carburetors to add that functionality and now your back to normal with just the pilot air screw and a throttle stop screw.
To save a few bucks what I am going to do is buy the cap+throttle cable setup $30 , and the idle screws separately ( $3-$5 /piece) and save a whole $10 because I have a tap set.
Then -in theory - you sync the carburetors with the slack adjusters on the top of the carburetor ( dual-carburetor motors must be sync'd really well or you can blow them up easily because one side spins up faster and the other drags behind with improper afr) and dial in your new idle screw.
its all documented on here.
Yeah It'll be pretty apparent if the top end has been rebuilt. Definitely go in and check the clearances for the ring end gaps, you could check the squish clearance right now while the motor is still assembled since the head was shaved.
It kinda sucks picking up a useless puller just to do one job But that puller has worked on a ton of machines for me so its nice to have around also.