Thumpr cam crap

Back up the bus; we are not the racer's forum so I assume this is a street engine.
What did you set the installed centerline to?
What compression ratio?
What cylinder pressure?
What idle vacuum?
How much lifter preload?

Do a leakdown test

1/8 per plate is too much, maybe waaay too much; make sure the secondaries are completely closed with those sewer drains, and you may have to bypass the PCV with holes that big.
Make sure the metering rods are staying down; tune the idle with the springs out if you have to
Too much timing IMO.And why locked?
Is this it?
20-600-4 - Thumpr™ Hydraulic Flat Tappet Camshafts
279/296/107+5 is a pretty ugly idling cam for a 318; posting 73.5* overlap. This cam needs a lotta compression, with aluminum heads. I have heard these in 318s at 700 or less and they do sound awesome.
EDIT
Those holes and all that timing, has thrown your T-Port sync off; that's why it's lean. I would set the sync first,with the mixture-screws out 2.75 turns, at 18*idle timing, and no butterfly holes at all, and plug all other vacuum sources on the intake, including the PCV. Then I would check the valley for vacuum, and if none found,I would reconnect the PCV.And finally prove no external vacuum leaks.
Now, you can begin the tune, but do not disturb the T-port sync much, if at all. Idle speed setting will be with idle-air bypass, with perhaps a couple of degrees of timing one way or another. Do not attempt any other tuning until the idle is close to perfect. Then tune the off-idle to about 2200rpm.
And if you just can't get it, make sure that all the lobes are still on the cam.