Thanks guys. Starting to get a few more details and pic through.
Full length headlining looks like it in the pic.
Original chassis still there and a big possibility of original 308 ( yet to be confirmed )
HK, green hj would probably not be my first choice in Sandmans but I dont mind it.
If by any chance the van comes back as full matching numbers, I will keep it original. If not full matching, I dont know what way I will go.

Heres a few pics, Looks like it will need a bit of work.