AMC 401 engine problem

Hallo guys

Hoping for some really good advise here, Since im beginning to go mental crazy soon.

I did a semirenovation on my engine this winter. I replaced my main bearings and oil pump gears/houseing because my oilpressure Was kinda low, and this upgrade very succesfull. I now have 25-30 psi of pressure when warmed up.

My other upgrade was to renovatedmy iron heads. They were done by a machine shop. New valves, seats, and both in and outtake was ported.
New Lunati 268 degree cam installed with New timing gear. New comp cam rocker arms (bridged), New hydraulic flat tapped. Decided through to use the old push rods Since they seem okay.

Now.. my huge problem. The engine is almost impossible to start, and i Think i found out why. I'm have almost 0 vaccum on the starter, but on e started up, i have around 10-12 HG/in. I know, not much.
I than took a compressiontest.. I have around 120-130 psi (11 bar) at cylinder 1 - all other 7 cylinders are half, like 60 psi (5-6 bar).
Okay - do i have a head/valve problem or maybe my cylinders took a smeltdown in wintertime..?? Than we took a leak Down test all 8 cylinders in the green with only 10-15% leak on a could engine, so im pretty sure know my heads/valve are tight, and regarding my cylinders, why on Earth should all 7 gode bad, and not cylinder number 1....
I simply dont know what im doing wrong. My new timing gear is lined up (standard) with cylinder 1 at TDC. I do belive i have a decent lash on my lifters (without oilpressure) Then the engine starts, its running very very hard og the exhaust is 3 times as loud as it use to be. I know the cam, and the ported heads my have some influence, but it seems Strange.
What on earth am I looking at here ?? Lengh of push rods, wrong timing (and why) other misc ??? What confusing me is, why the h*** i have a decent compression on cyl 1 and all the otters are pretty much crap..

Any, and i mean any suggestions are very welcome. Please take in mind, im not a mecanic, so lets try keep the terms and expressions a little simple

Thx

Okay i'll was maybe a little to fast ;-)

Yes the lifters are also new (same brand and a combo kit)
My rocker arms should have a 1.6 ratio - and i there is no diffenrence as far as iI Can see.
My heads are torgued down with (i think 110 lbs) 150 NM in a speficic order - inside and out.

/

Wiped cam lobes or lifters perhaps? You can check travel on the valves and make sure they are opening fully. If they aren't chances are good the cam/lifters got wiped.

I would think his compression may be a wee lower than your 70 390. My 73 304 had 155 minimum. Unless he has swapped out to flat top pistons then maybe around 168 or so.

Sounds even more like the cam lobes got wiped out from the last statement. I would check your valve opening max on each intake valve comparatively. This will tell you if you have killed a lobe.