drawing conversions

Hey fellow tread heads: I'm scratchbuilding a M113 Lynx from specification drawings. All I have are a right side profile and the corresponding top view in 1/35. Both drawings are at 90 degrees to each other so I can take the measurements right off the sheet. However at the front of the vehicle and on each side there is a portion of the armour that angles down and away from the center line. How do I measure or change the drawing to give me a true representation of the shape that I need, to cut, and to give me the actual fit on the vehicle? I know this isn't much of an explaination of what I need but hopefully someone out there knows what I'm talking about.