Can’t figure out this carb and idle

UPC: 190861126640

Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,500-5,000
Intake Duration at 050 inch Lift: 214
Exhaust Duration at 050 inch Lift: 224
Duration at 050 inch Lift: 214 int./224 exh.
Advertised Intake Duration: 288
Advertised Exhaust Duration: 298
Intake Valve Lift with Factory Rocker Arm Ratio: 0.444 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.466 in
Valve Lift with Factory Rocker Arm Ratio: 0.444 int./0.466 exh.
Lobe Separation (degrees): 112
Lifter Style: Hydraulic flat tappet; Advertised Duration: 288 int./298 exh
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Disconnect the Vcan vacuum line, yank the Vcan over to whatever timing she likes,and crank the idle speed up to 1000rpm, until you get the carb half-azzed working, and then start backing the timing off; you can't hurt it at idle doing this,and it will give you more time to diagnose it.
If you can't seem to get anywhere, do a LeakDown test, to see if the valves are closing.