Are you basing your intake cam timing off of the cam card or are you using the .050 before and after max lift on the intake lobe?
If based on the cam card try using the intake lobe timing at .050 before and again after max lift on the intake lobe and then verify the exhaust lobe is moved the same amount in relation to TDC
I've had more than one custom ground camshaft not have the lobe centers ground correctly on both sides of the cam
I've also had more then one timing set that the dots are not aligned or marked correctly on the cam sprocket
If the cam gear dot will not aligned perfectly with the crank gear dot move the cam gear dot one tooth to the passenger side and recheck your results
I HATE MURPHY