leaking Brake lines

I'm building a 72 Demon I have disks in the front and drums in the back . I have installed all new In Line Tube Stainless lines . We got all the leaks in the rear taken care of but the front end is a different from the proportional block to the front wheels all the fittings are seeping . Worked on it for about 3 hours no lock , dose any on have any tricks to help us Waco Demon Thank you