Watts, you bust me up.
Regarding cooling lines...I'm seriously thinking of adding 3 inches to the hieght of the center tunnel. For strength I'd keep the existing top section about 50% intact and run longer sides from the floor up 3" higher than the existing tunnel top. That should make room for cooling lines, heater lines, and if needed - oil cooler lines. Then put a rennshifter on top with stock throw and just knock 3" off the shifter length (and angle the bushing at the firewall for propper allignment with the rod.) for a nice short-throw shifter. Oh, and maybe a little sign that reads "Don't touch the tunnel - it's hot." But it shouldn't get any hotter than the tranny hump on Dad's old Ford.
-Ben M.