99 magnum to 833 tranny?

I don't think the oil pan will fit due to the rear main seal area. Yes the timing cover will fit. Are you wanting to keep the vee belt set up? The front balancer will be the biggie. The LA318 was internal balanced . And the Magnum is external balance. You will have to get A flywheel for the Magnum 5.9. Think Mopar has one,not sure on aftermarket. Even the LA 360 won't work due to the LA 360 has a balance weight of 14 oz out and the Magnum is 19 oz.If my memory is correct.

hopes this helps