I vaguely remember those passages tying into the vacuum fittings. Check that. I deleted the entire egr system with all its hoses and such. I capped the fittings, and didn't bother with opening those holes


89 SWB, V-6 5SPD, OME Shocks, 16.5X37's, 2"BL, SR axle, Gen2 brakes, Lincoln w/Superwinch