Our trucks were built in a different time.There were no highways and just in general the speeds that they were driven at were much slower. I wish I could find it but a while back I was doing research on posted speed limits during the 40's and I found a page that listed them state by state. If I remember right the average speed limit was 45 to 50. Many states didnt even have a speed limit, it was more of a case of what speed was prudent. The roads were just not designed with high speeds in mind. Personally I have no problem with keeping the brakes, suspension and just my whole truck in general stock but I drive it the way it was intended. I remember what my Dad always told me when he turned the keys to his B1B over to me when I started driving.... "be nice to it, its a senior citizen". He let me drive it every day and it was my daily driver until I got my '69 Charger R/T. I think a lot depends on where you live and the conditions you drive in and of course what your looking for in your truck and how you want to drive it . I live in a small town and outside of town we get from place to place on Hwy 80 which for the most part has a 55 to 65 speed limit. Much of it is lower. We are surrounded by wide open space aka desert and the roads are pretty much flat and straight with a few slight hills and curves here and there thrown in. No bumper to bumper stop and go traffic My B1B has 3:54 gears and is more than capable of traveling 75 or more but but I just stay local. Mechanically it is very sound and all.I will drive to Tombstone or Sierra Vista if I get the hankering and usually no farther not because I cant, but because I think its better to drive my '94 Mazda pickup (Ford Ranger) that Dad left I just drive the speed limit and enjoy every moment of it. I drive it like it was intended and designed . I make sure there is a lot of room between me and the person Im behind which is usually pretty easy to do because Im driving the posted limit (55) and most folks dont. At least until the snowbirds arrive who generally drive 10 to 20 below the speed limit at all times. It is not uncommon for some to drive 25 to 30 in a 55 on HWY 80 . Grrrrrr .
I can see why folks would want to update their brakes and front suspension especially if they live in a place or drive in conditions that make it better to have the updated components or just because they want to and can. Me.... Im lucky, the roads in my area aside from I-10 that passes by my town haven't changed much in the past 60+ years so they are just perfect for our trucks . For me a major part of it is the charm of driving it the way it was made right down to the 16" bias ply tires that go bump, bump, bump when they are cold hahaha. If I lived in a bigger city or regularly drove it in a congested conditions or at high speeds I might be inclined to perform some updates too. To me its all about your vision of what you want your truck to be and the conditions that you drive in.