you dont say what engine is in your van at the mo. if its a deisel and not a cvh you will need to change the loom and petrol tank too. easy conversion.

as for the dash, anythings possible but it will need a lot of cutting and trimming to make it fit. then all the switches and guages will need to be modified to fit. if i was you i would stick with the mk4 dash. they arent that hard to find. allways people breaking rs turbos and xr3is, just look in the for sale sections.

but if you must go for the mk5 dash then i would recommend using the 1.4 cvh and loom from a mk5 escort so that all the switches and instruments plug into dash without too much chopping of wires.