Go on Paul you know you want to pour more money into the beast - do it!!
Seriously though the possible location of your shifter opposite the steering wheel looks pretty good.
I'm waiting to see where mine ends up now, but I'll simply jigsaw another hole through the top of the steel tunnel to suit my shift location and touch up the edges with Por15.
Perhaps then I can too get Mike to machine me up a pair of gear levers, one for the car one for the top drawer??