[914Ghost]

I Have Dellorto DRLA on all my cars.
36's on my 1600 VW Single Cab, 40's on my 1.8L 914, and 40's on my 912.
The Dellorto's on my 914 run as smooth as the original Fool Injection, and they're great on the truck. 20-25 MPG in town and the plugs read perfect. They are maintenance free 100%.
I haven't touched them in 6 months.
I ran Zeniths on my 60' coupe 1600 Normal, then Switched to a good set of split shaft solex's- and had a NOTICABLE difference.
It revved free-er and smoother, and had a better idle "sound"- the Zenith's were muffled.
Weber's are fine, don't let any techno-speak talk you out of a good modern set of carbs that have proven their versatility for 35 + years.
The linkage problem mentioned is EASILY fixed with a long 8mm hex bolt on one side.
That said Dellorto's are better than all the above under most circumstances- they flow better than Zeniths (of course), Webers, and Solex's due to the longer 2ndary Venturi and availability of taller air correction jets.
AND they're tunable to your needs.
DRLA's have an air-bypass screw so you can tune air flow in each barrel to EXACTLY the same.
I think your Zeniths have 28mm (maybe 26?) Venturi's, thats what I have in my 36 Dell's. And I have a pile of jets to set them up and 3 different vent sizes.
Search for Solex's on Ebay, there was a set of Beautiful 40 P11's the other day for $249 Buy It Now, manifolds are cheap.
Or I can probably Sell you a set of 40 Webers OR Dellortos ready to bolt on for $375- (With Manifolds).
Someday the Zenith and Solex parts will be gone- period.
Might as well upgrade or start hording parts now.
-Bob O