As much as i hate this answer,call your builder. From what ive seen fastline is like a pvl. These are set at a distance before tdc in mm. You should use a indicator like the one from jj&a. Also you wont be at 7 deg. The ign curve is different than stock and most likely will require a different initial adv setting to be were you need to be in the rest of the curve. Also your stroke and rod will affect timing setting as piston speeds near tdc can change. You have 3choices, search more info on this subject(its out there as i searched this out for a pvl last year),call your builder,or stick with stock and run 7deg because everyone else says to.