gearing has a lot to do with tire size(& preference). Here is a calculator to play with....
http://www.smokemup.com/auto_math/mph_range2.php IMO, the gearing with the richmond would be optimim (for my useage anyway), with a 3.73 rear gear. that is based on a 29" tall tire, that i run on my truck......the 4.10's feel just a tad low(not bad tho). if you up the tire size to 35", you can see on the chart that the 4.56 gears give just about the same cruise rpm, as a 3.73 on a 29" tire

sorry , no pics on the linkage rods......on the 69, I basically started from scratch, redrilled the hole in the firewall, & made a pretty much straightline shot to the bell crank. the holes were drilled oversized on the arms, to accept a 7/16 rod end. it looks really clean, & works just as well

as far as modifying the stock rods, its not too bad.....you need a tap & die set, to thread the underdash end of the rod, & may end up welding a chunk of fine thread bolt to the opposite end, the screw the rod end onto. good luck.....crazyL