Quote Originally Posted by Fast355 View Post
I have seen that intake bored to 2" with a 454 TBI in a 4x4 K1500 on an engine that put down ~250 rwhp. That intake falls on its face around the 250-270 rwhp range even bored but you are by no means close to making that happen.

If your truck is a 2wd with a 700r4 and 7.5" 10-bolt you are more like 18% loss in HP. Torque loss is proportional to RPM and you will lose less % in torque. You might have 20% loss with a mechanical engine fan and unlocked torque converter. I am probably only around 30% loss with my 1-ton driveline.
Yeah, its the light 1/2 ton driveline though it is 4wd, 10 bolt, small drums etc. Mechanical fan, and unlocked converter.