Challenger Gas Tanks
Year	Description	Quanta #
1970	Gas Tank, w/o Vent	CR-8B
1971	Gas Tank, 4 Vents on Side	CR-8F
1972	Gas Tank, To 3/72, 4 Vents on Side	CR-8F
1972	Gas Tank, From 3/72, 4 Vents on Front	CR-8D
1973 - 74	Gas Tank, 4 Vents on Front	CR-8D