454 dually header/exhaust question

[SCOTI]

Originally Posted by cag

where did you put to o2? how do you like that intake? did it make a diff?

o2 sensor is near the end of the collector. You have to make sure there's X-amount inches of exhaust tubing post sensor (I don't recall what it was @ the moment).

My truck had the factory GM cast iron QJ carb intake w/the aluminum TBI 'adapter' so it's a better intake (looks & weight). Hard to say performance wise as the cast iron/adapted TBI set-up had 100k on the clock (dished pistons/wear & tear/stock cam etc....) vs. a fresh flat-top piston long block + BBC Melling 'RV/Towing' cam (same OE heads just rebuilt w/the block).

Truck can light up the duals post build vs when I bought it. Definitely feels more responsive but it's hard to say what the largest contributor to that is/was.