Open meant a breather on the valve cover rather than a tube linking the valve cover to the air cleaner like all 68 and up cars.
My understanding is that the smog pump (called A.I.R.) and the closed crankcase vent were mandatory on California cars but the closed vent was also a stand alone option on 49 state cars.
The HD filter air cleaners were identical to the non HD version other than the different filter element and the info stenciled on the housing.
__________________
My Break Away Squad
1969 Fbird (base OHC, 350, 400HO & Sprint Cvt’s - 400HO & TA ht’s)
1969 Custom S 2dr ht
1969 LeMans (2dr & 4dr ht & Cvt)
1969 LeMans Safari wagon
1969 GTO (2 Cvt, 2 ht & Judge ht)
1969 Cat (3 Cvt’s & a 2dr ht)
1969 Ventura wagon 2 seat
1969 Exec 4dr post
1969 2 Bonnie Cvt's & 2 wagons
1969 Bonnie Brougham (4dr ht & Cvt)
1969 Grand Prix 2 SJ’s
1969 2+2 2dr ht (Canadian)
|