muncie m22 question

[sbc10guy]

I am looking at a muncie m22 rock crusher right now and i had a question on the value of it being that it is in a borg warner T10 case. The transmission was professionally rebuilt and never been installed since the guy had the wrong spline when he got a new clutch and decided not to use this trans.. I was wondering would the value take a big hit from not having the correct case? Also is there a way to tell that it is actually an m22 and not just the T10 from looking at it now. I dont know if this helps but its 26 spline in 32 out. Thanks