I built this platform a while ago to hold my ratchet shifter for my 700r4:
bottom plates and main top plate made out of 1/8" and the tubes are 1". I just bolted this thing to the floor and you would be very surprised how stable it is...my boys use it as a step to get into the back.
And I have had a JBfab cable shifter for my SYE241 for the last couple years (billet style) bolted to it:
So when looking at the shifters, I was trying to find the easiest route to go to still be able to use my shifter mount. NWF makes nice cable shifters, but I would have had to cut a whole in my mount and most likely cut out some of the tube underneath since the cables run "under" the mounting surface. JB's billet style (like my current one on my SYE241) in the triple stick configuration would be very close to not fitting on the platform with the ratchet shifter on there and how it mounts. Then I saw his buggy style one....and it should work perfect!
I will say, as soon as I put a cage in mine, no matter what, getting in and out of the back seat sucks...there is just no way around it really, but it's a price to pay for anyone wanting to ride. So I say make the experience more comfortable for the driver and front passenger as much as possible (aka, taking
@skunked advice and make it so it's not so annoying to shift all your levers) because to be honest, the driver is going to be the one in the vehicle the most...I wouldn't worry about the passengers as much. They will be happy just to hang out in such a bitchin ride for a day...that's just my $0.02, take it for what its worth (which isn't much, haha)