I have one of the much maligned 78 Cutlass salons, with the 5.0 liter chevy. It has 70,000 on it i recently installed a SBC 400 bored to a 408 and 9.5:1 comp ratio with a Lunati street master 221/230 duration @50 Holley 650 Street Avenger Carb with Flowtech after burner headers. Just broke the motor in the other day. it sound awesome,
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although I have not driven it yet,