hi, i have an 03 dodge ram hemi 5.7. i have installed a comp 268 cam, headers, jet chip stage 3, cold air, etc... when i installed my cam the specs said requires aftermarket tunning, so i ordered a hypertech 3 and my truck ran ok but sometimes would shut off when i came to a stop. so i recently ordered a diablo sport and when i went to install it to my truck diablo sent me a message saying they cant send me a custom tine due to my cam and that i would have to take my truck to a diablo dealer. so, its gnna cost me another 450.00 to ge a custom tune. will i be able to tell a difference with the diablo programmed to my hemi or should i just keep the hypertech III instead. thanks for any info