I need to replace the battery in my '86 NA. Most of the parts houses list several battery sizes for an '86 300ZX. Anyone know the correct battery group for an '86?

 

go to an interstate battery shop. You will get the right battery and one that will last years beyond one from walmart at not too much more bucks. You can also ask if they have any scratch and dent models. New battery warranty and about half the cost of one. but sometimes may not have the right size.