Just my own experience. The 390 in my ranchero ran its best when it was a 2 barrel. I put alot of work in that motor, 4barrel,many diff. carbs,head work, different cams, new pistons(twice). Just was never happy. It didn't have the torque I was hoping for. It didn't rev. Had the worst gas millage I had ever had, around 8-9 around town. And then after all that work, the oil started to look like some white creamy foam. I started the 460 project, and havent looked back, Way more torque, Dam thing will light the tires up at will. Pulls my comet at 90mph with the gas 3/4 of a inch down. I like it alot, dam the FE's. IMO
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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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