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Old 09-19-2002, 09:45 PM   #3
gofastmercury
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Join Date: May 2001
Location: calgary alberta canada
Posts: 366
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Not sure, but I think the 270hp rating is a two barrel, and the 320 is four. Had the 270 2 barrel in my ranchero, after playing with it for 3 years and only getting a best of 15.1, I pulled it and put in the big 460. Havent run it yet, but the diference is amazing. Sorry, back to your question... If your chilton has cam specs, see if there different. Pretty sure for 69 the testing was done at the crank with no accs. so called gross rating.
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93LXcopcarSOLD14.3@96 @ 4500ft 2.02 60ft on street tires.
my 67 ranchero NOT A 390 ANY MORE! 460! 3.70's cast manifolds, comp cams 262H, performer, 750DP 100K out of 79 F250
NEW(oct20/02)14.58@95mph 2.3 60 ft
corrects to:13.86@100
66 merc comet351w, isky roller 600 lift 268/260@.050, vic jr. 700DP, 5000stall, 4.56's c-4, 3400lbs with driver
12.3@110 @ 4000ft 1.69 60 ft
corrects to:11.69@115
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