https://share.icloud.com/photos/07rBMfeBB0TzNp2N6tX0VzGFQIf you would just take several pics, with a wider view, of the frame near and around the number, we can tell what frame it is. At least we can confirm TF. Show us the Ebrake bracket, front of frame, cab mount bracket, steering box, springs, steering, suspension, master cylinder............ANYTHING! Pics pics pics pics!!!!!!!!!!!!!
This number does not make since right now. It does not really matter what it's all about. What matters is to determine if the frame is a TF. You should have been able to search and decide that already. We are getting focused on this number TOO MUCH!!!!!!! FORGET THE NUMBER.
It's our fault, we focused you on the number. The number does not matter. It's not your VIN.
Once we know it is a TF frame, long bed or short bed, 55-57 or 58-59 we can blog all day on why the number is the number. I just want to answer your question which is the wrong question. If you are buying pre-made you just need the era and bed length of the frame.. Like I said, if you are making up your own brakes, you don't need to know anything. So are you buying brake lines? If so, where are you going to buy them? The sets are $150-$170 range. Steel or SS.
We know the cab is for a 1/2T short bed step side. You can put that cab on any frame you want if it passes DMV. You can put any bed on it you want.
Very sorry about all this confusing chatter between us all. We get interested and go off on things like that number. Lets get you back to what you need to know
without the number. I must mention that HB told you way back to measure and search and observe on the internet to determine frame era/model. I said the same thing in my first post. You have not reported that you have done that. Your pics and reported observations will solve this.