340 issue after camshaft change

I’ve had the engine apart 3 times now verifying installation. I’ve done valve adjustment 4 times now. I’ve verified that I’m not 180 degrees off as many times now. I’ve drained antifreeze 3 times now and will be disassembling it for the 4 th time in the future. I did not find anything glaringly wrong any time I had it back apart.
This engine should at least run ok without degreeing it. It doesn’t.
I do not have it in me to continue to troubleshoot this camshaft any longer. What’s wrong with it? I don’t know but I suspect it’s ground wrong or maybe it’s a marine camshaft and ended up in a auto box. I no longer believe this is an installation issue but a manufacturing issue.
The car is up on my lift with the cover on and I’m walking away from it for a while. When I get over the disgust, I’ll take it back apart and remove this camshaft and install a different one.
Thanks much
Degreeing is not exactly a "tuneup" procedure but to verify proper machine work on the cam.and timing set. It does allow changing cam advance or retard as desired by your application to tune where maximum torque occurs. This is accomplished with offset keys or bushings and drilling the cam timing gear index pin hole oversize to fit an offset bushing. Generally for street this is not required, but verifying correct parts manufacture is.