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Re: Caprice Models
#1. Trim levels.
#2. Not without some form of boost - Blower, turbo, ectectera. 85 cubic inches is a lot to make up in simple refinements. 1 HP per CI is fairly respectable for an N/A engine. 2 HP per CI is resonable for a boosted engine. By that crude math, without a means of blowing through the intake, making much over 270HP with the L99 would be a real chore. The iron-headed LT1 is already making 260HP in stock form, with a tame cam and poor intake/exhaust tracts. And highway fuel mileage is the same for both engines. A little work on the iron-head LT1 and it makes 300 HP very easily. More serious work gets you 360-ish without too much stress.
#2A. As fast as a stock 5.7? The speed limits in most places are either 65 or 70 MPH. Either car can do it easily, so I suppose they are just as fast as each other.
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