Just see this , and noticed silver spacers between the seat and lower wishbone , am guessing they are to lower the body ?
You are correct. Reduce spring compression- body lowers.
1/2 inch spacer lowers the car by 1 inch. Not sure where this video is from or what context but wtf is the brake flex line not secured!
This is my car! Yes 1/2 spacers lowered the ride height perfectly in the front. And I’ve since made brackets to hold the solid brake line. Been like that for a few years of almost weekly driving and never a problem.
What Calipers are they Theo ?
I used the same technique to adjust ( lower )the height of the front suspension after fitting new springs. Three washers + longer hardened spring pan bolts.
Dave
Wilwood conversion kit. The new hard lines didn’t match the brackets I had to fab new ones. Otherwise the brakes are fantastic car stops like a modern car.