I have no idea why G&P is debated weather or not they're the lowest or the highest grade... That seems like a bunch of people that don't know what they're talking about giving their opinion on something.
G&P Gearboxes need shimming straight from the factory...
But these days who keeps stock internals anyways? G&P's externals are the highest grade I've seen... That puts them @ #1 in my books
