I tow with an F250 and am always concerned/watch the weight capacity of the tires. I see the folks referring to the weight ratings of the F350. What kind of tires/weight ratings do the SRW 350's h...
You may need to change tire size to get the higher ratings (don't forget to check the rim rating also).
Newer models are different but for a very long time when looking at SRW, the difference was the spring pack being stronger in the F350 but otherwise, they were essentially identical trucks.
So if you bump up the spring pack to match the F350 and make sure the rims and tires match, you for practical purposes have an F350.