I was told otherwise..But not 100% sure? I believe the pulley's are part of the actual balancer.A/C balancer.....I think all the 68 to 71 340 balancers are the same...
In a morsel of a swap meet memory there was a balancer for the 340 in a-body with air that had a thinner profile than others. I cant bet money on it today.
The guy I was with walked to a thin profile balancer and made offers 3 times before he got it bought.
OK then , Glad I wasn't betting on it. Maybe theres a thin balancer for 360 in 2nd gen A w/ air. Anyway... carry onSomeone got had... the same balancer on 273, 318 and 340 for 68/69 with or without A/C. PN 2658458