Not Ranked
My 427SR Roush (351W) with QF 770 Holley & 5sp TKO-600 ... has 22k+ miles on it.... still get ~11.5mpg City... 16mpg Hwy ... Just tuned it 2months ago .. I can get 250-260miles on a tank full if I drive mostly highway with a couple gallons to spare... 
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Many thanks,
Mark
Superformance: SPO2454 , Titanium w/Black Stripes
Engine: Roush 427SR w/770cfm 4-Barrel Holley
Transmission: Tremec TKO-600
Last edited by Moritz55; 09-20-2020 at 05:51 AM..
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