The only thing I've ever heard is the 347 had oil problems, but most companies have redesigned their piston/rod combo to fix that. The 331 is supposed to be a good setup, I don't kow for a fact cause I haven't built one yet but anytime the topic's come up the 331 seem to be the top choice. I'd look at D.S.S. motors/rotating assemblies, they seem to be one of the better engine/stroker companies.
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1990 Notchback: BBK Ceramic Coated Full length headers, Dr. Gas 3"- 2 1/2" x-pipe, Flowmaster 40's/turndowns.
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