I don't know about down under, but here in the states a Chevy engine is almost always a huge cost savings over anything Ford. You can argue all day who makes the better engine but there is no way an argument can be made about cost. My 625 HP Ford FE will end up, when completed, costing somewhere in the $18,000 range. I can make more HP than that, and much easier, for about $10,000 in a Chevy. Of course in a Cobra, at least here in the states, a Cobra with a Chevy in it is rare, and a tough sell when the time comes to part ways with the car. In a street rod, I don't think the pedigree of the engine matters all that much. Personally, in a street rod I always loved the looks of the late 1950's 392" Chrysler Hemi's, but that's just me, I guess.....
