well, after return style, you shouldn[t need to go higher. after that, a custom setup will be required.
as for the pumps, i'm pretty sure they changed them between the 00-04 models. i do think that the 03-04's are all svt's, but the 02's and under are not. its hard to base hp on a fuel pump if running e85. you need more fuel/molecule of o2. so you need to flow more fuel. if john is running 173/151 whp/wtq right now, i'd say thats more than fine on the stock pump. i'm not into tuning, but if you wanna multiply ratio's, i beleive e85 is at what 10.7:1? and 93 octane is at 14.7/1 = 1.374 x more fuel. = 237 whp on 93. now, i honestly have no idea if my logic is correct. but it seems correct to me! lol
but you definitely need more fuel.
The stock pump is good for a bit more than that, but not too much, and once again, i think its a different pump if you have an earlier year.
Now I rive 2 7.3 L diesel trucks!