The one I used is from a 1.6 Escort making around 80 hp and has a mechanical secondary. I stuck one on my Festiva and it ran great out of the box from idle to almost 7k rpm.
I did find this on a site selling Weber carbs, same series as everyone uses on L6's. According to this they're only good for up to 2300cc so they usually would be undersized on a 250 (4.1L) but the sixes don't rev very high and the cylinder head doesn't flow well. The Escort carb is a near copy of the DGV carbs so I'd thing they'd perform similarly.
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THE DGV SERIES
Any search for the ideal 2-barrel, progressive down-draft carburetor would surely end with the DGV Series. look no further for versatility, wide adaptability, easy installation, low initial cost, trouble-free maintenance, excellent drivability, increased fuel economy and improved performance. Designed for engines displacing 1200cc-2300cc, the DGV Series carbs feature diaphragm type accelerator pump circuits and models with manual, water or electric choke actuation. The DGV also has a power valve circuit to facilitate low vacuum running conditions.
Greater improvements in throttle response at a slight penalty in fuel economy can be achieved by using the 38 DGAS synchronous opening model. This is a high performance alternative to most any DGV applications.
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