When the C4 was first released to the public in 84 (there was no '83)
the passenger side had an oblong rectangular box jutting out of the
dash. It looked wierd to say the least.. It was supposed to adhere to
some safety rules at the time. Anyway, that got nicknamed the "Bread
Loaf". If you go onto Ebay and search for an Early C4 corvette for sale
and see the pictures of the passenger dash, you will understand.