more torque from 4.0 ohv?

Just wondering whats mods i can do to get more torque, i was thinking headers, Catless, 2.5" Exhaust to cherry bomb turbo muffler, coldair/snorkel, half-shafted or bigger tb (wouldnt a bigger one gain more topend than down low?), comp cams 410 (is there better?), maybe some roller rockers? and can u use sohc pistons to raise cr? Also the snorkel on the trudck use the stock rubber intake hose between the filter and tb, whst size abs pipe do you recommend i replace it with?

 

[Spdrcer34]

i dunno about spacers but wouldnt shortening the intake runners give me more tq?

There are alot of factors in the theory of max torque output....

But it has been proven that lengthening the intake runners does increase the torque output at any given RPM.

Ryan

 

[MikeRWK]

guess i got it backwards