I see this picture. In the proposed file is only 3 part file. The remaining files are assemblies and contain at least 23 parts of which 13 standard parts may be reduced to 3 parts without drawings. Suggested parts are in one piece, without cavities, as in real detail and assembled engine will be only layout. Is this your goal? Require additional dimensions or other details forming the complete set, of course, if you need the correct parts drawings. Drawings should be in inch or metric system?
You offer a maximum of USD151 and a minimum of USD43.2 per 13 parts drawings. This leads to sad thoughts, but I need a job to enhance the reputation.