It all depends on your setup. You can make way more power/torq with larger lift cams than just your average low lift “popular” cams. 799/243 are one of the best flowing heads a 5.3 with milled 799 will outperform a 706/862. Fast,high ram, gen4 intakes. Worth the money. And any big truck even with stock inj can take 25deg most 28 with no KR, it’s all in the setup
It all depends on your setup. You can make way more power/torq with larger lift cams than just your average low lift “popular” cams. 799/243 are one of the best flowing heads a 5.3 with milled 799 will outperform a 706/862. Fast,high ram, gen4 intakes. Worth the money. And any big truck even with stock inj can take 25deg most 28 with no KR, it’s all in the setup