That’s a good idea, I do have a wifi scope that’ll work. There is a build-up on the piston tops that I can see just shining a flashlight in the plug holes. How obvious are the markings on most pistons, would it show through some build-up?
Just run it. Maybe check slack on the the timing chain by a back n forth of the crank...n Make sure you have an oil pressure gauge hooked up that reads PSI.
If it's been run already and isn't noisy... it ain't broke, so don't fix it.
Some people are ocd, other just need to make it "their build".. sometimes its okay to leave good nuff alone.
