Without getting too political here about different countrys' attitudes to conservaton of resources

I agree that the costs of a diesel conversion are pretty prohibitive everywhere.
Having said that, the C3's do lend themselves to conversion much more readily than the early Pinz, from what I've seen so far, as well as being usefully that bit bigger in all dimensions.
For that 'hard to convert' reason I eliminated a 712 as a candidate for my off-road camper project and getting hold of a 718 at anything like sensible money has proved impossible in the UK/Europe (i.e. the ex German coal mine box bodied 1992 with 66K miles at $31,500 !)
Apart from fuel savings (for US readers petrol in the UK is currently 92 pence per litre, equivalent to $5.91 per US gallon, diesel is over $6 per US gallon) my interest in a diesel conversion was prompted by safety considerations with volatile petrol in extreme desert conditions.
Have any of our readers had bad fuel experiences in those extreme temperatures?
On another note Dennis - have you had a look in a 303 diff to establish if a pto gear might be available that would mesh with the 303 pinion to provide the required drive to the rear-most axle? (in my quest for better road-gearing for a C306 or TGB22 even - I like that longer wheelbase)
Alternatively how about replacing the ZF transfer box with an early 'unbreakable' 4 speed Range Rover gear box/transfer box that we could hang an overdrive on?
Can I presume there is no overdrive available for the ZF setup?