I don't understand why the wheel arches were in the wrong place? Maybe Joris’ friend is trying to maintain the rear overhang of the original 130 HCPU tub like Mulgo's station wagons? Otherwise something strange is going on.
Land Rover originally created the 130 (actually 127 inches) by joining two longer halves of a 110 chassis in the centre – adding an extra 17 inches to the wheelbase. All 110's and 130's have the same distance from the end of the chassis rear cross member to the rear wheel. A 110 tub should bolt up to the rear of a 130 (the 5 tabs are already there) with the rear wheel arch in the right place.
However, you will need to shorten the front section of the tub where it rivets onto the bulkhead behind the 2nd row passenger doors, or lengthen the chassis.
For comparison - Photos of a 130 dual cab with original HCPU tub, Mulgo's 130 station wagon, my 130 station wagon (with a Series 3 109 rear body which overhangs rear chassis by 50mm), a 110 hardtop and a poor photo of a 140 inch (approx) station wagon.

