Hi I wonder if anyone can help, Im speaking from the United Kingdom, Ive been into American Cars for over 40 years, I have a chevy 3100 truck a 55 buick and a 41 Willys, The Buick has been fully restored but streetrod type 427 BB Chevy smoothed firewall Olds front clip to supply discs, Well the Master Cylinder Failed but its not Buick cos 55 Buicks never had power brakes. I narrowed it down to a 1982 Ford Mustang or cougar and ordered one from Rock Auto, It came and is the spitting image in all respects but the brake pipes are slightly smaller in size to the one that is fitted to my car. Thy are small and large in size front and back on my old master same on new but new is slightly larger hole front and slightly larger hole rear.....I take it one is metric the other Imperial, The question is can I put larger ends on my pipes? Anyone know?.