Just got my head back from the machine shop, changed a few valves that had stem wear (luckily found them NOS with the rockers (followers?)). Probably was running zincless oil. Gave it a shave of 10 to address a slight head gasket oil leak above the accessory drive area.
While the 68-69 Sprint air cleaners look identical it seems like the 1 bbl changed; 69 1 bbl looks like the sprint unit less the chrome once installed (as in the pic you posted) but the 68 units (the one I have and most pics online have the look of a downsized 68-69 2bbl V8 air cleaner with a pronounced outer lip on the lid.
Interesting that my 69 1bbl has a spacer at the thermostat housing that is basically a blind version of the 68 spacer that had the bypass fitting. Maybe it wasn't correct since my 69 Sprint doesn't have one and I can find no reference to it in the MPC for 69 model year.
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My Break Away Squad
1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops)
1969 LeMans (2dr & 4dr Hardtop and a Cvt)
1969 LeMans Safari 2 seat Wagon
1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop)
1969 Catalina (3 Cvt’s & a 2dr hardtop)
1969 Ventura 2 Seat Wagon
1969 Executive 4dr Sedan
1969 Bonnie Cvt
1969 Bonnie 3 Seat Wagon (2 of them)
1969 Bonnie Brougham (4dr Hardtop & Cvt)
1969 Grand Prix SJ (2 of them)
1969 2+2 2dr Hardtop (Canadian model)
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