well, first of all the 307 is an Oldsmobile design/build. Buick last made a v8 in 1980.
you should still have a 6 bolt BOP style bellhousing on your transmission so it would be fairly easy to swap in pretty much any Buick, Olds or Pontiac V8 as well as many of their V6s.
however, if you need to get a new trans or you want to swap the engine out for a chevy then you'll either need to get the appropriate trans or a dual pattern 200r4 which would have an extra gear.
here's a good page on the olds 307: http://www.442.com/oldsfaq/ofe307.ht...IDEngineDetail
i don't have a decode book for 85 (mine only goes up to 79) but you can try posting your VIN and trim tag and i'll see what i can get.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
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