I have a 1977 FJ40 with a 4” lift. I’ll try this, as I need new frame to axle linesI’ve never noticed a harder pedal with stainless soft lines, but maybe you would going from older rubber to new stainless?
If you’re interested in longer lines, I have a 2.5” procomp lift on my 1970 and I used 2002 Tundra rear brake hoses for both front and rear frame to axle, they are 20” long. Gave me a few inches over stock length.