Those stub stacks look too tall for the filters you have...
Ideally you want a diameter and a half of the inlet as free height above the stub stack, but the more clear height above it the better (too a point, obviously  )
So weber 40's you really want 60mm above the stub stack as a minimum.
Read that in some carb tuning manual years ago.
And sometimes stub stacks are known as velocity stacks....
Cya,
Sam C
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1973 1303 (super beetle) in Jaguar British racing green,
Raby 2270, B spec gearbox, Lots of carbon fibre, Wolfrace Octane Black 17x7.5, Goodyear Eagle F1's, Kerscher suspension front and rear, kamei airdam in carbon, corbeau seats, momo millunium steering wheel.
CDT eurosport 6.5 front speakers, IDMAX 12D2 sub, rockford old school amps.
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