well uhh i think we found the problem, we took off the rockers and stuff so the valves stay closed, put some air into the spark plug hole and gasoline in the exhaust port and it started bubbling like crazy.
we have a bent valve, here's the video
https://youtube.com/shorts/yhOJENiTfrU
I tried to upload it as a normal video but it became a short ):
so basically the dude who did our timing guides messed up our engine and didn't tell us. so from now on were probably gonna stick to working on our own cars.