tacoma firewall???

how much do i need 2 tub my fireawall to lay 20s with a BD?? and what will i have to move??? pics would be awesome
 

no body has good pics????

about 3 inches at the bottom i think. sfbd or trad?

On both a traditional BD or a SFBD you ill need to tub the firewall a good amount, generally about 2" deep at the top portion.  On the driverside you will need to move the clutch cylinder if you have a 5spd and I relocate the main harness to the side of the firewall just foward of the door jambs under the wiper cowl.  On the passangers side I move the harness for the wiper motor and other bs.