f5fstop or anyone else is this safe

[Huck BB62]

Having put custom seats in various vehicles, and by looking at the mountings for the seat belts, I'd say "probably". I think that by the time your lower mountings fail that you've described, you'll have a lot more to worry about! The critical part is the leverage created by an impact. The belt's still mounted to the B pillar. The lower one will have to shear all of the stuff you've bolted down. I'm no engineer but I'd find that highly unlikely. I understand the pins, but the forces required to tear bolts and steel apart at only an inch extension would seem to be pretty high, high enough that again, I think you're in a heap of trouble bone and skin wise at that point!

How's the comfort now? This may be exactly what I'm looking for! Me and the missus kick ourselves every single time on a longer trip for not getting the lux package!