I've had centrelines on a few cars and have worked them pretty hard and never had a brake issue so I think you'll be OK.

As for white lettered tyres, I had a mate back in the 70's and he HATED them. He loved T/A's and all his cars had them, but he always ran them inside out because he didn't like the look. As I said earlier, I LOVE the look and will go to all lengths to have them if I can.

So it's just a matter of preference...... If you like 'em, show 'em.

Vans are all about showing your individuality anyway.....