I've contemplated putting a c6 in place of my t18 but I keep hearing the horror stories of it really making the 300 feel REALLY sluggish, so I wanted to see if any of you had that set up and what you thought about it?
As a huge 300 six fan I personally would never have an automatic behind one. There is a noticeable amount of parasitic power loss going from a manual to an automatic with these engines. The powerband is so short on these engines (like a diesel), they're all done making power by the time the automatic starts doing anything. You could probably help things out by regearing the axles, not sure if it would be worth the time and money.