A long enough aftermarket cable will bend to where ever your linkage is positioned. No need for a bell crank or pulley or anything else. Just a stand off bracket, simple to make.
You do not need to always hook up the throttle to the top of the linkage arm, it can hook up to the bottom of the carb linkage arm also.
As far as mounting the carb that way, all you need to do is offset the mounting holes a bit & you can mount that carb any position you would want.
Or, buy a plate of 3/8 to 1/2" aluminum, hole saw, jig saw, band saw, drill & tap & make your own carb adaptor.
Your throttle linkage posted is way too complicated IMO, more things to cause friction, cause the throttle to stick etc.
Is the 90 degree bend a piece of aluminum?
If it is & has no Teflon inner liner, it will eventually wear through & cause the cable to stick & it could happen at wide open throttle.
There was no difference in power when I tested the carbs mounted sideway or straight forward.
I did have more problems when the carb was mounted sideways with fuel delivery under certain conditions.
MBHD
