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the US 3.2L cars were 9.5:1, I think and had 217hp, and the Euro spec cars had 10.3:1 and had 231hp, so and increase of .8 gave 14hp.
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I
think the cam setting was changed as well (not sure since I didnt look it up)
I have made the DC40 cams (mod-s) for 3.0 or 3.2 engines using Weber or PMO carbs. With Webers the best results are with the normal 102 lobe seperation. With the PMO's a wider angle (108) seems to work better. To be safe I would stay under 10-1 compression ratio with the Weber carbs.