tech tip::
http://www.stovebolt.com/techtips/4bbllinkage.pdfThe primaries in parallel w/ the cylinders. You could use a stock AD pedal which pushes a rod to a bellcrank on an engine plate
http://s67.photobucket.com/albums/h298/1951otter/?action=view¤t=Scan1_0001.jpg that has a 2' lokar cable set up like you show, to the carter linkage that faces away from the head. ALL very adjustable. As seen in these photos. This is on someone's 292. Not sure all engines can mock up this plate so the lokar cable-pedal works great.
SEE Inliners International :
http://www.inliners.org/click on ''tech tips'' ...then ''Throttle Linkage''
>> A common problem on inline engines that have carburetion upgrades is throttle linkage. Most modern carbs are designed to operate by cable throttle, not the primitive rods found on most early engines. The following deals with GM inline sixes but same principles apply. It can also apply to multiple carb installations where two or more carbs are linked together and operated by a single cable.
There are certainly many ways to skin a cat, but here is a solution I used after trying several others.
>> The diagram above shows how a 4-barrel carb should be mounted on an Inline engine. Note that the secondary throttle bores are inboard and parallel with the cylinder alignment. Now, there may be some carbs where this just can’t work, but it is appropriate for most modern (Holley, Edelbrock, etc) 4-barrels. If you mount the carb sideways like a V8 it’s easy to see that fuel distribution is going to be unequal. The engine will run - but you will lay awake at night, just knowing that one end of your motor is getting more than its share of fuel !
BUT do let us know how she all works out D-52, please.

I have liked your work in the past.