Hey spikekid999, check this out! Hughes sells this for magnum engines, and it kind of sounds like what you are experiencing. HUG 7720 "Fits All 1993-2003 V8 Magnum Engines
Attention Magnum Truck Owners!
Tired of the gasket blowing out on your plenum cover? Engine pinging under acceleration? Using an excessive amount of oil? Notice that your mileage is dropping? Don't want to weld the cover to the intake? Worried about turning up the boost on your supercharger? This is the answer! This kit will replace the plenum plate with a one piece, high strength, 1/4" thick aluminum plate."
Sorry to hijack the thread...carry on.