Ok thanks for the information provided against BYP, I fear that suggestions will be made based on someone having no actual experience so thanks for your honesty Joey. at the end of the day I'm going to be building a 400whp car that if not done correctly could prove fatal, I need to be able to put my trust into someone and being a mechanic myself I want the work to be carried out to the same high standard that I provide on a daily basis. The chosen mechanic/engineer must also be open to positive input from myself, and not disregard anything I have to say.