I always use
www.deutschconnectorstore.com or prowireusa.com for my individual Deutsch connector needs. I always feel like I've wasted money when I have those connector kits sitting around with unused pieces haha.
The 12-tooth trigger is plug and play, you simply change the trigger pattern in the ECU software and you're good to go.
A crank angle sensor is also a nice addition if you have the coin for an ATI or Ross balancer. There are a couple kits on the market. Cars making big power could use the extra accuracy I'd say.