New Challenger 6spd Transmission behind hemi

I picked up a 96 GTS gearbox. The thing I like about the Viper is it has a .5 gear ratio for 6th.

Haven't settled on an ECU yet. I'm hoping I can find one in a yard somewhere but the problem is, I believe I can't use one that came off an engine with an auto. That might prove to be a problem and I may have to go with an AEM or FAST. Haven't decided yet for sure.