so confused.. -- 77 crewcab seats into 68 sub?

[fourspeedwagon]

I see a lot of questions asking about swapping various seat into assorted trucks, blazers, burbs,
Mine is specific and I haven't found a match to it yet but I may suck at searches.
I have both front and rear bench seats available to me from a 1977 chevy crewcab (3+3) and I'd like to use them in my '68 suburban. Anybody have good advise on this swap? Should I go get the seats or keep looking for something that will fit easier? Thanks guys- Greg