http://www.gmt400.com/forum/showthread.php?23790-1998-K2500-Single-Cab-Short-Bed&highlight=1998+single+cab+short+bed+k2500
This was my answer to getting a heavier chassis under my k1500.
We did this swap on a buddies 96 a while back. Vortec top end on a TBI short block. It runs perfectly, its just kinda weak compared to a roller cam vortec.
o2 sensor bung costs like $2. Install the header, decide where you want it, mark the header, drill a hole in said header, install o2 bung. Weld in place. Probably cost $10 max if you took the header somewhere and had one put on it.
Since im quitting my job tomorrow, im borrowing the digital camera from here and taking yall some pics this afternoon. What are they gonna do? Fire me?? Lol
Thanks, the brake light mod is where you put 1157 bulbs in the upper position of the tail lights and wire them to the brake lights, where they light up all 4 bulbs when you press the brake. Several write-ups on it on here.