I also know sometimes lower rpm can hurt mpg. Especially with a short stroke engine or one with cam that makes peak torque higher in the rpm range. I doubt I will need or want to spring for the cost of a t56. Like I said drivetrain is not what I will have trouble choosing. I was just hoping someone had a platform I had not considered or could give me data on a good choise. Something like believe it or not the 68 caprice despite being a little heavy has a decent aero profile with fast back roof line and at constant highway speed the extra weight won't matter as much as the aerodynamics. So that would be my choice bla bla yadda yadda. Maybe there just isn't a very good platform to start with?
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