What ever I do, I will change bearings/ rings/ oil pump/ T chain/ get the heads checked. It there a BIG problem going to a Magnum with engine Balance issues ? I've got a 727 since the original engine was internally balanced. I will also need to keep all of my stock alt brackets/ motor mounts and possibly my mechanical fuel pump . Would like to use 91-92 Dakota exhaust manifolds but my current exhaust system is in perfect shape (maybe down the road)