Need advice on buying dart swinger

how is the engine? is it fresh or old and tired? how about the rear? 360 v8 and old 7 1/4 rear won't hold up to any punishment. you say the car was originally a 6? then what has been done on the suspension? front end will need to be made heavier to hold the additional weight of the v8.you will need to look at all of these things first.if it checks out then i say if it looks to be solid and the engine is new or fairly new then 4500.00 to maybe 5000.00. alot of the work will have been done, which you will be miles ahead on.