Brake lines get hot?

Just got my 68 Barracuda brakes completed and the car finally stops. Had to replace the distribution block ( inlinetube ) perfect match. Anyways the brake lines from the master cylinder get hot from the exhaust manifold. I have power brakes and the booster and master cylinder above/side of the exhaust manifold. It was design this way from the factory..but after a short drive the lines coming out of the master cylinder to the distribution block get so hot that I can't even touch them. Everything is mounted properly.

Wondering if causes the brake fluid to boil. Seems like I loose a little pedal after driving awhile.

Is there some kind of heat deflector to protect the lines from getting so hot?
or is that just what it is.

Chris