SSG
first I would get hold of Howard and nail down in writing if they want you to install your cam using the center of a presumably asymetrcal lobe i.e 104 Intake Centerline
OR
do they what you to use "for timing only" numbers off the cam card ie. Intake closes 46.5 at.050
which could differ by say 4 degrees (try both and see)
and ask them at what lift "advertised is" most likely .020 but could be different their lobe catalog might show
now
With what YR said
you would not be retarding your cam by 2 degrees
Your cam is most likely ground with 4 degrees built in
so you are advancing your cam 2 degrees instead of 4
What I would do
If your compression and dynamic compression is near the max go ahead and install it straight up or 2 degrees
if your compression and dynamic compression is on the low side then install it 4
