1. A viable option. But have you modified and sunk a lot of $ into the 54 frame already? If so, I'd hate to see you scrap it all and start over. It hurts...A LOT. Psychologically and financially. I know from experience.
2. It might be a lot of work and as you are aware it could be difficult. It can be done though from what I've heard. I have no personal experience here. Someone with experience may chime in.
3. S10 frame... If you think mounting the box is difficult, try this. Body mounts, radiator mounts, BED MOUNTS, engine and transmission clearance to cab, keeping everything square, centered in wheel wells, etc... it is a BIG can of worms and not for a novice. I have personal experience here. I was very green when I attempted this and it caused a lot of head scratching, frustration and then I got so deep in over my head...I sold it and took a huge hit to the wallet for my lack of foresight. I could do it now after much learning in the field of welding and fabrication but my thought is, " the best frame for your truck is the one it came with from the factory."
What about swapping beds and getting a 54 bed? Sell the 53 bed for as much coin as you can get and get the proper box for the frame. Purists will cringe, it may bug you too having the wrong box matched up with the the 53 body, but it will be the easiest option by far. More than likely the cheapest option too. Trying to make the other box fit can be done but what is your time worth as well?
Last edited by Fox; 08/08/2017 4:49 AM.