Help reading plugs.

These are the first plugs to come out of the new build, after about 50 miles of around town cruising.

Specs:
‘70 340
.030 over
X-Heads
kB 243 pistons
Comp 268h cam
HEI Ignition
Doug’s D453’s
Quickfuel Brawler 650cfm
Timing set at 12 initial, 32 all in
Plugs are Champion RN9YC

Any experienced opinions welcomed!!