318 magnum VS 318 roller VS older 318 gas mileage

rustytoolss said
... 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 have a B&M Magnum/727 flexplate if you need one. It was originally on a 5.9L so I'll have to make sure it's the same as what the 5.2L would need but it would solve the balance question. If you end up going that route, drop me a PM.