Camshaft dillema

Personally I would send back the cam and order a different cam all together. I have been having good luck with howards or Lunati cams or the HL series comp cams. Cams that take advantage of the .904 lifters.

Seat to seat duration stays the same, duration at anything above seat will be slightly bigger wont change as much as putting a bigger cam in. When I graphed out my cam for my 360, i picked up 2 deg duration at .050 going from 1.5 to1.6 and about 4 deg at .200 my is 226 dur at .050.