the big one ..reliability
fuel economy
more power
ease of maintenance
cheap supply of scooby engines for years to come
how expensive is it to get a vw engine rebuilt,and most of the parts are 30yrs old..
heres some ideas,
secondhand scooby impreza/legacy
= 250-400 bucks
recover most of outlay, by breaking and sell unwanted parts,
gearbox,wheels, lights, bonnet, suspension,rear diff, seats,brakes, etc etc
keep nearly free ,engine and wiring loom,
sell turnkey rebuilt vw engine £1200
buy conversion parts ,gearbox adaptor,clutch,cables,exhaust,cooling bits,etc,etc £1000
heres some that have been done ..
http://www.benplace.com/85westy_2_mecanique2.htm