Doing the 2jz swap on my truck 89 4runner sr5 and running factory twins required me bashing in my firewall which made my ac evaporator box unusable its like a half inch off from going in.im sure i could cut it and plastic weld it back together which i would kinda like to avoid doing, have enough projects and things to do .but wondering since my truck was ac equipped and some werent if there was any differnce in some of the boxes they used that directly linked from the fan and into the heater core box?