[toddoky]

You have more than likely mounted your engine in a more forward position in order to install your transmission and allow your NP205 to remain in its stock location. That is very advantages overall, but is also going to aggravate your search for a set of headers that will be compatible with your application. All of the headers available today that are specifically listed for an LS swap in a K-10 were designed several years ago when the use of the longer, late-model automatic transmissions was not commonly. They were designed to be used primarily with the engine mounted so that rear block/bellhousing mating plane remained in the stock SB Chevy position (TH350,SM46 and 4L60E installations). The late-model transmissions all require the bellhousing mating plane to be moved forward from that location to be able to install these transmissions in front of a stock mounted NP205 transfer case. When that is done, the tubes of the fore mentioned headers also move forward into the decreasing wedge created by the inward forward pinch of the frame rails. Some of the eBay-sourced headers can help you overcome that issue, just be prepared to deal with/accept the poor flange-to-port transition geometry and spark/boot clearance they are notorious for. Your final judgement of installation success will be determined by the amount of front driveshaft clearance the right side header provides you with, which will usually leave you less than impressed.