New engine has loss of compression

Yup bought the heads, took one valve out to put in a flimsy spring to check piston to valve clearance, and then put them on the engine, so they were essentially ran right out of the box. And yea that could have been due to the bad valve job. The weaker hole bore looks identical to the others, and they look really good, no scrapes or scuffs anywhere, so yea it was probably the heads, and the fact that I couldn't get a good seal with the compression tester due to the bad spark plug threads. I also only spun the motor over about 3-4 times, and the throttle closed and air cleaner still on, so that probably didn't help the numbers.

I got somebody to look at the cam and just like the guy at the machine shop said, it didn't look too good, two lobes had much more wear than the rest (wore through the parkarization and through another layer it looked like), and a cam change would be a good idea. Its easier so I am going to pull the motor out to work on it, I need to change the oil pan anyways as it is too close to the ground, and its just easier to work on the engine on a stand.

While its out I will take a look at the bearings (I expect them to be fine but its not hard to check). Put a different pan on, fix the heads, maybe get some light porting done and install a retro-fit roller cam, just gunna bite the bullet and pay the extra cash for the piece of mind. Dont wanna go through all this and end up having to worry about the cam again.

I guess next time I wont just throw parts on!!!!!!!! At least I got to drive it all summer.