It is a serious $$$ investment, but I'd do it all over again if needed. The initial cost isn't quite so hard to swallow when you figure you're getting a transmission that is more stout and reliable than the C4. Lentech has outlaw cars like Tim Forbes running mid-8's on Lentech AOD's that go an entire racing season without the need for tear-down or rebuild...no breakage. They've got a 1-year 'no questions' guarantee on the tranny and three years on the valve body. Every tranny leaving their shop is fully dyno'd before its shipped. I cut my first filter apart (remote filter) and there was absolutely NOTHING in it, so they do a thorough job in prepping the components & casing before its assembled.
I got the transbrake for consistency and advantage at the tree since my car is pretty much a trailer queen. I've also got a full manual valve body. Overdrive is still functional, but I can lock it out electronically. I also control converter lock-up electronically.
Explain to Len & Chris how you intend to use the car and they'll help you make the right decision on building the tranny with the parts that suit your use. I also sent them my TQ and HP curves to help them set me up with the right converter. Even though my tranny is setup as a race tranny, it runs super cool and would be perfectly streetable.
You've made the right decision IMHO. They'll steer you in the right direction with some of the other decisions you've got to make about the tranny.
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Jeff Chambers
Trophy Stock #3
11.611 Seconds / 116.7 MPH
Chambers Racing Team