13 K for a Dart 427 sb seems like a fair price. I built mine with the help of a local engine builder two years ago and it cost $9.5K and is only a 408. Mine is not streetable because of my cam and comp. ratio but it is an ass kicker at the track. 615 HP 580 ft lbs torque. I sure surprises the guys with the Cup cars, ZO6's and Porsche turbos.
Keith Kraft has had a reputation for a long time as a top Ford engine builder so I know you would not go wrong with him. If you buy an engine from Roush you will have the reputation of a top Nascar owner behind your build.
Take your pick.
Cranky
