****Please note: Poster has since discovered that the Radian install in this position is not compatible in this position, so these 3 across are no longer valid****
1998 Chevy Suburban
All in the third row, all seat belts (middle is lap with locking latchplate, outboard are l/s):
All FFing, BLVD, RNXT, BLVD. Had to do drivers side BLVD first, then RN, then for the 3rd BLVD I had to buckle it before sliding the seat into position in order to reach the buckle, then tighten. The Radian needs tricks, but I'll post that in the radian install thread.
The same seats, same ordered worked RFing as well, but the last BLVD was *extremely* difficult to use the lock off, but possible. Install the same order as FFing and again, buckle before positioning the last BLVD.
It was not possible to do any combination of RF and FF together with those seats.
Second set up, still 3rd row seat belts:
(starting from passenger outboard) snugride, FFing RN XT, FFing BLVD
install BLVD, then Radian, then SR. The SR base was really wedged in there and I couldn't tell if it was actually installed tight or not until I removed the Radian (and it was). It was wedged tightly but did not bend the plastic out of shape.
Not checked by tech.