Originally Posted by woj's72lemans
It is the 318 magnum its got the Holley throttle body on it and looking at edlebrock manifoldsthey all say will not fit the 92 dodge magnum 318
The Magnum is basically an LA block with some oil passage (and other minor) changes with new heads. The angle the intake bolts make to the heads change and there is no heat cross-over from the exhaust. The oiling changes of the Magnum support lubricating the pivoted rockers from hollow pushrods instead of rockers on a shaft that's fed oil from a galley drilling as done on the LA. A regular LA intake can be used but the mounting holes to the head have to be filled, redrilled to the new angle and spot faced so the underhead surface of the bolt will be flat against the intake, a big effort but doable by most shops or competent/equipped home boyz.
You may find it useful to remove the computer and use the older LA electronic distributor as there will be no injection function for the computer with the carb.
You can't easily change the Magnum back to a mechanical fuel pump, it can be done but it is complicated and pricey as the timing cover and cam need to changed and or modified. So the simple approach is you need to get a return style regulator to drop the injection pressures down to 5-6 psi the carb likes. Using a return type regulator keeps fuel flowing to cool the pump. They will get hot enough to burn out if they have to pump against a dead headed regulator as the engine just can't use enough fuel to allow for cooling the pump. Doing the more expensive by-pass regulator now just saves dropping the fuel tank and replacing the pump a little later from now.