Im going to do a combination thats 4.155 x 3.900 Stroke using an ls next block and i do have a sniffer test here in utah Im just wondering what kind of duration would i want to go on the cam? im going to go with the afr ls1 230cc heads truck intake and what injector size would i need i have a 255lph pump the build is in a 6 inch lifted truck with 4.10s and 315 75 17 tires so im trying to build a torque monster also would the factory 4l80 hold up? compression will stay at around 10:1 for pump gas