Fish 'n' Chips wise, the best kept secret in New Jersey is the Tops Diner, East Newark, New Jersey. It's a special and they only prepare it on Fridays.
What makes this accomplishment particularly interesting is that the Tops, which is a far better diner than any for many miles around, is in rather close proximity to Kearny, New Jersey, home of the revered Argyle and Thistle restaurants, each renowned for their fish 'n' chips.
Well, I'm not one to venture on sacrilege by saying the Tops's rendition of fish 'n' chips is better than Argyles's and Thistles's. But I heartily suggest you give it a try. Judge for yourself.
The special is a soup to nuts deal. Bring an appetite. If they have the blueberry cobbler the Friday you're there, make that your dessert choice as part of your meal. Boy, is it good!
One note, though. While the fish is excellent, and presented in a generous portion of two good-sized filets, the chips are French fries. They're good, but, at no extra charge, you can have the superior waffle fries instead. Good choice. You'll be back.