On Sat, 8 Jan 2005, Rojo2G wrote:

> I'm changing the head on a 79 GMC truck. The exhaust bolts are very
> deteriorated. They are a grade something.

Originally probably grade 2.

> Can I buy the matching grade or a higher grade to replace them. Are all,
> say, Grade 5 or 8 bolts the same and usuable for the exhaust?

Yes and yes. You can even buy stainless steel bolts and studs, and brass
nuts, and never again have a problem with hardware deterioration.