505 stroker fresh off the dyno - Power seems low? Thoughs?

Here’s a 505 build........
10.9cr
XS290S cam 1.5 rockers
STG 1 RPM heads
2-2 1/8 headers
Pump gas
6bbl

Notice it’s using quite a bit more fuel:
This pull was at 170* water temp.
A “hero pull” at 120* was made, and the results were over 650tq and 600hp.