One thing about the BC setup is the angled shims that route the cable through the firewall to the pedal. Not that they'd be impossible to reproduce, but they're nice, clean, and look like they might be a hassle to make without the right tools/materials.
The instructions say to mount them so the cable angles "up" from the firewall, but with an Explorer upper the cable hits the plenum.
Don't know if mounting them so the cable is angled towards the driver's side would cause any mis-alignment at the pedal, but I think it would be a reasonable trade-off to gain some clearance at the plenum.
On a buddy's truck we also had to bend and re-drill the main bracket at the TB to clear the angled IAC connector with one of Ryan's earlier harnesses. Not that BC's design is wrong for everyone though. We just found some slight mods were needed for this particular install, using the Explorer upper and Mustang TB and this individual harness.
Paul