AMC 401 engine for my 1972 Duster

AMC 401 engine for my 1972 Duster
I don't know if this a good swap I owned a 1972 duster with a slant six engine a buddy of mine has a fully built amc 401 400+ hp that never got to use he's selling to me for $1500 with a 400 auto trans its has tons of new Parts headers, competition cams, Milodon oil pan, csr electric water pump and the list goes on....im tired of my slow slant six I mean good engine but too slow so I'm asking for opinions on this swap not sure in amc amc is considered a mopar

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Go for it! I have no idea on what the difficulties might be, but my mother-in-law has a 71 SST Javelin with a 304 that hasn't run in 30 years, and I doubt it ever will run. If I had her Javelin, I'd be looking for that very engine you've got a line on.