Six carb linkage install Options

[hars914]

I am in the process of coming up with a linkage setup similar
to Roots post. As far as installing it on the trans I see I use the bolts
on the cover for the cable bracket but as far as the pivot arm do I have
to drill and tap into one of the round bosses on the case?
From pictures of different linkage setups I have it is hard to see.
Any help and pics will be appreciated

[thomasotten]

This may be a dumb question, being that this is the second time I am asking it, but here goes again. Why do you need this linkage belcrank for six cylinder cars? Can't this mechanical reversal be accomplished in the engine compartment, rather than having to run all the way to the tranny, then turn around and go into the engine compartment?