GM built the last pushrod Buick V6 last week:
http://forums.aaca.org/ubbthreads.ph...e_today#UNREAD
This engine was first released in 1961 as a 198 cu in engine. It was used in many Oldsmobiles as well as Buicks. The 198 was the base engine in the 1961 Cutlass/F85. In the late 1960s GM sold the rights and tooling to AMC for use in Jeeps, but ended up buying it back in 1975 after Oil Crisis #1.