Sounds like you need to talk to some converter shops.
I would say, telling them the motor should produce around 600ft/lbs at 3200-4000rpm is a pretty safe bet when discussing your combo and figuring out the converter requirements. I’m guessing it will be one of those “as tight as we can make it” situations.
Yeah, you're right. I'm looking over what is available for 23 spline 727/518 at Turbo Action and there is only one in three different configuration: regular, medium and tight. I already have the tight one, so now I'm thinking there is something wrong with it.
I got a couple calls to make tomorrow. I'll get back to this thread with what I find.
