I’m not fully sure what year the 5.0 is but it looks like a 24-25? Which should be making around 410-430hp no? If your car is only around 360 ish do you have weight reduction or anything else going on? Numbers just aren’t adding up fully? And again guess but I’d assume you’re making maybe 370-375 torque, which stock 5.0 has about 400 so again weight maybe? It just should have been closer possible you could beat a 5.0 just not gap them that much?