so guys i bought this 5.0 off my buddy and it came with bigger MAF ported upper lower intake and ported heads.. trickflow stage 2 cam.. shorty headers stock h pipe stock mufflers. car will idle at 1000-1500 rpm and come down to 800rpm after a minute or twi.. if i tap the gas pedal it will rev up to 1500 again when it should barely go over 1000 considering i barely tap the gas.. will stay at 1500 rpm then come back down.. any idea what it can be?? also valves sound like theyre ticking i know its a typical foxbody problem but its pretty loud.. valve adjustment?? maybe dirty valves or clogged valves? please help a foxbuddy here thank you guys!!