Symptoms of wrong cam installation

Little brother having issues with his car running as it should
Basic combo
Stock stroke 340, unsure of compression
Supposedly fully ported eddie heads( done years ago by Shady Dell…they went 10.90’s on a 408 he has in another car
260/264 565/565 lift solid cam..106 lsa, supposed to be installed per Howards at 102
Excellerator
950 pro systems
26 in drag radial
4.10 gear
8 inch convertor specced to combo
Small tube headers
Full exhaust

car ran 12.70’s previously with X heads, much milder/ smaller cam in good air with 10 inch vert flashing low 3000’s rpm

he had a buddy install the eddies, and the new cam( its the same one i have run in both my 360 and current 418)

anyhow car is a dog out of the gate. Only ran marginally better than before. 1.85/1.90 60 foot.
Only ran 1/8 mile, in bad air went mid 7.90’s…not what i was expecting.
Cam sounds very sedate in his car, much smoother idle than in my 360 when i ran that cam.
Cam was installed with motor in car, and it has a Milidon gear drive on it.
My suspicion is the cam isn't in at 102, where its supposed to be, its retarded, bleeding off cylinder pressure, killing his bottom end, and making his 8 inch vert only flash at 3200
Called the guy who did the vert( does mine, trust him 100%) looked at his notes, and said the vert should be flashing way higher…..no kidding…lol… he looked at his notes and set it up how i had told him to..tight, around 5k

i suspect the cam is way, way off from where its supposed to be, and is the culprit.
With his relatively low compression, stock stroke, and this “ big “ cam everything needs to be right to bandaid it to all work together.
Thoughts?