morning, I have a 1989 e150 full conversion van 302 motor aod trans, needing to replace exhaust, needing advice, want to put full flow headers on, anybody done this? right now has factory setup, Y pipe to dual converter then single pipe to resonater, single in muffler dual out to each corner of van, all from converter back shot, this system has little more than 400,000 miles. seen headers under 200$$ whats best way to go, have one o2 sensor on y pipe at y. working back yard, no torch or welding equiment.......van runs good just under 50,000 on motor, wanting sum power gains, have knm filter, any ideas or advice pics, any ?s thanks much............
