Advice Needed - Can't Start Rebuilt 273

Have you rechecked the compression to see if the valve adjustment helped at all?

I did recheck #1 and found no change. I didn't bother to check the rest. I then put on a good Edelbrock carb. I got it to almost start a couple of times again, but basically the same results as before.

There are a lot of "unknowns" with this engine. I have spent a lot of time on it and I'm about ready to cut my losses. I don't want to be a quitter, but I do have other options. My plan right now is to pull the front cover and check the timing marks. I they are correct, that engine is coming out and I will install the 360 I should have put in there in the first place.