Is there a definitive list that someone has made in a thread? Likely should be a sticky for this part of the Forum...
Like you have to have this flexplate or flywheel, you have to have this harmonic balancer.. this is the adapter you buy for the front of the cam to run a mechanical fuel pump? You have to have x oil pan with x oil pump tube...??? Even the obvious if you want to run a carburetor you have to have a Magnum compatible intake manifold..?
Thank you for anybody's help on this...
I have not seen a one stop shopping list and every time people ask questions about Magnums, a lot of misinformation pollutes the threads.
Nobody I know of currently sells an SFI approved flex plate for 5.9 Magnum balance. You can get the neutral balance B&M flex plate and cut it out to match the correct ones they no longer make, but you lose the SFI. B&M 10241 is the small diameter 904 trans with Magnum 5.9 balance. B&M 10242 is the larger diameter 727 trans with 5.9 Magnum balance. You can use the factory 5.9 Magnum weighted flex plate from later models and you just need to elongate one torque converter hole to line up, but this is more for stock and lower horsepower street builds. The 5.2 Magnum flex plate is neutral, so the current B&M neutral balance works fine. Any 5.9 Magnum running an aftermarket rotating assembly that is neutral balanced obviously accepts the B&M neutral balanced flex plates. There is a Mopar weight kit that can be welded to the torque converter for 5.9 Magnum balance and then you use a neutral balance flex plate. I forget the part number for that one.
Only the factory style Magnum flex plates work with the factory crankshaft sensor location for factory Magnum EFI.
All Magnum engines use the same oil pan. No difference for 5.2 and 5.9. A Magnum can run any LA 360 oil pan and pickup combo just like an LA engine, and can use LA oil pan gaskets, even when a Magnum timing cover is retained. Magnum one piece oil pan gasket can be used with an LA 360 oil pan, but the front steps in the pan will need to be filled with large gobs of silicone or right stuff sealer. I don't know if a current oil pan that is Magnum specific to allow the one piece Magnum oil pan gasket to be used without all the extra silicone. You can cut the top of an LA oil pan off along with the front seal area and weld on the same cutout from a Magnum truck pan and then you have a perfect flange for the Magnum one piece oil pan gasket.
A Magnum timing cover have no opening for a mechanical fuel pump and will not physically clear the mechanical fuel pump eccentric. If the Magnum timing cover is retained yo must use an electric fuel pump.
Hughes engines sells the adapter for the short snout Magnum cam to use a fuel pump eccentric.
LA heads can be used on Magnum engines IF proper rocker arms are used with pushrod oiling, such as Comp Ultra Pro Magnum and all brands that are copies of those, such as PRW and Speedmaster. Oiling modifications can also be made to the head to add an external oil line, but I have not personally done that one.
Intake manifolds; yikes. Mopar made several different version M1 intakes. Some single planes had LA bolt pattern with Magnum thermostat and bypass hose. Some single planes were Magnum bolt pattern with Magnum thermostat and bypass hose. Both versions were available with or without fuel injection bosses cast in and both had the four barrel carb flange. Mopar also made two barrel fuel injection single plane manifolds that accepted the stock throttle body. Mopar also made some Magnum bolt pattern dual plane carb flange manifolds.
Edelbrock currently makes the only aftermarket intake with Magnum thermostat and bypass hose. The carb version is sold everywhere as an Edelbrock brand. Hughes engines sells the fuel injection version under their own brand name. The chines copy manifolds with dual bolt pattern all currently use LA thermostat and bypass hose. This complicates things when running Magnum timing cover and retaining Magnum serpentine drive and air conditioning.
Magnum engine blocks with some LA headers require slight grinding on the left side rear Magnum engine mount boss to clear the header pipe. Magnum blocks can be run with older LA style starters if the block is celaranced around the starter. Easier and better to run the smaller Nippondenso starter used on all Magnum trucks.
If retaining Magnum factory fuel injection, there are couple of tuning options for the OBD2 PCM that came on the trucks, identified by three smaller connectors. SCT has been doing programming for these for use. HP Tuners just announce support these last year. I think Syked ECU tuning supports them as well. Older OBD1 PCMs with one large connector are not programmable.
I am sure there is more, but this what I remember off the top of my head.
Good luck to you.
