YearModelRecommendedAlternativeTechnology
1971-75230D Series685 x 2SMF
1975160D, 170D685 x 2SMF
1974-75130D, 232D685 x 2SMF
1974-75R80 Bus674 x 2SMF
1974-75D2C2 EV110 Bus341 x 4Vented
1968-71Models All689 x 2SMF