1982 Camaro's didnt come with a 350... So you may have been swindled into buying a 305 or it could have been swapped into the 82. Wasnt till 87 that the 350 was offered as an option in 3rd Gens...

Post the block and head casting number or if you know if the motor is pre 86 or post 87 will be able to find out if you can use your stock fuel pump and starter. Your 307 dizzy should also work in that motor as well.