Mackvette1 Posted April 8, 2018 Share Posted April 8, 2018 Looking for the best solution for my truck. 06 granite with ami 370 hp 13 sp trans with 4.17 Mack rears with 22.5 tires. Looking for the best hp setting and to pick up the mileage a bit..have injectors on the bench and thinking about making them to 427. Or should I keep it a 370 since them are close to the same in hp and torque? FYI my old ch with a 350 in it would eat this granite for breakfast!! Any input would be awesome!! Quote Link to comment Share on other sites More sharing options...
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