Looking good except the last image.
I suspect the snake oil is just glycol.A good antifreez /water mix,on a well designed coolant system, goes well esp.with the Brick internals,for sure.Water has a very high heat capacity,Glycol,not so much.
If the tyre looks OK I would ride them,carefully,as you will,to begin with..but I'm a cheaparse.
Patience and care,now,,,, will be the virtues needed for this Brick.The generous make over,you have started is only as good as its potential bullet proof reliability.
All the best.