Even custom cams aren't perfect

I have had good luck with ultradine cams-bulletcams make good power. I have put lots of small block mopars together. And as the last guy said 3 things affect where the cam degrees in. how the cam is machined. how the timing set is machined. how the crank is machined. You got it right on at 103.5 that is where I would put it. Yes sometimes we have to clean up some parts before we assemble them. I had to spend hours on my super victor intake to make it work with the Indy T/A heads and the mopar valve covers. All part of hot rodding.