Thanks heaps this is good stuff!

Id rather run a holley and on fuel, but getting a clevo to pass an emission test equivilent to an el 5L would be really hard.

And setting up injection on a clevo, I can imagine would be a big expense.

Only other thing I can think of is the injected 351w out of the trucks in the states... Only thing there is buying the engine is say $2500 and the output is pretty poor, where as $2500 into a clevo will get it going very very well.

Like injection would be the ultimate, like in your pic, I know holley do a universal multipoint fuel injection setup with a 1000cfm 4 barrel throttle body and stuff, but I dont have any idea what its worth.

And if I went the lpg route, ive been looking at the twin carb, twin mixer stuff from gas research.

I know this is slightly off topic and not many people will care, but I would have thought that a stock 4.0 would be as fast, if not faster than a 351 (and use a lot less petrol doing it, not that I care ). Wouldn't sound anywhere near as good though...