Was it tuned after the rocker install? Going from .456 lift (stock) to .541 with 1.9 rockers is certainly not going to LOWER torque. Although your not changing much, you ARE still allowing more air in and out. No other mods? Open the intake any? Exhaust? Of course I had an Overkill tune prior to tuning on my own.
I can tell you, with ported SC and TB, 3.4 pulley, 1.9YT RR, headers, 3" exhaust all the way back to split, I'm VERY happy with throttle response, the pull and top end. Maybe I'm just lucky and did it right?
And seriously I'm on the fence to (not) take this engine apart for my cam build or leave it alone and build up the spare engine I have sitting there... It's that good!
Only reason I'm going to do the cam build is simple... I WANT MORE!!!
