[Pete]

I can't tell from the pictures.

Looks to me like the cams retarded if i had to guess i would say at least 4 degrees basicly going from 114 to 118 +-2
When i checked my cams way back to start all the port work they were out on left field right bank was 119 109.

Looks like the same thing on yours looks like cams retarded
Intake 118 +-2 Exhaust 108 +-2

I pretty sure this is the reason for lower pressures.

I have my notes somewhere different pressures with all the different cam timings i just need to find them.

By the way 118+ intake timing is over/past the best power curve.

Good luck.

Pete

Just remembered,this is a big if, if the exhaust moved to 106 or lower you are very close to having the ex.valves hitting the piston,look at your pistons for marks if so then the low pressures could be bend valves.
Don't mean to scare you but better to check now then find out later.