I had B&J custom build me some Greek couplers for my 7.5 10 bolts in the liner so they are set up to do them now.
Ok, I just called Mike to check & the longest 32 spline TH400 coupler he makes is 7" total length & they are $120 each, part # B&J-80. The custom 7.5 10 bolt female are $150 each & they are a no mod bolt up. Part number B&J-SID.
Sid.