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Re: Torque within a usable range of Speeds
"450-500 range on both horsepower and torque."
You will have no problems, i have a pontiac with those numbers verified and 3.45s where 70-75 is about 2k rpm. Plenty of response and not lugging at all. I wish i had 3.91s for more stoplight fun, and becaues at 2k rpm the exhaust drones, i wish it was more like 2400-2500 just so i wasn't in that "sweet" vibration spot for the exhaust.
I had a 428 (current is 455) with less power but more streetable cam with lower rpms (like 1k to 5k) and i still had 2.56s in it with i think .69 OD in it. It was ridiculous, 1700rpm was like 80. BUT i got good mileage, and it didn't chug at all, because the cam was suited for running down low and i had tons of torque.
Some will talk about custom ignition curves and making sure timing is all in by cruise speed for efficiency and all that, i can't speak to that.
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