your in the right place for mod addictions!
here is my opinion on modding at 300k+. get a compression test, a great time to do this is during the glow replacement. also check your trubo for compressor fin damage and shaft play.
after that, if compression checks good, then you are generally good to go modding. do the DIY 6637 intake upgrade and exhaust, get rid of that flat down pipe if you havent alerady. then pick up a set of gauges and a chip. by the time your done with all that youll have read enough to know what to do if you want more power.
IMHO these are less complicated than gassers. once you get to know them that is.
glows - there is a writeup in the 99-03 section (a sticky) that walks your through testing the glows. they install like spark plugs under the valve covers, use only motorcraft ZD-11 plugs, and a tip; remove the little black box on the passenger side by the valve cover, it helps you get to the rear vc bolts. also, a peice of rubber fuel hose to unscrew them after you break them loose helps a ton. most socket walls are too think and get stuck under the rocker, so you have to screw them back in a few turns to get the socket back out.
also check or replace your glow plug relay. stancor 986-502 i believe is the part number, its an upgrade from stock.
Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...
1995 PSD, ext cab, one wheel wonder
, 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck
(Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY Electric fuel w/ wvo conversion
"A clean house is a sign of a mis-lead life."