pulling my hair out over this knock sensor
 

Can ANYONE tell me where to buy one of these damn things......looks like they are a discontinued item.......I broke mine off pulling emissions junk.......I have a 5.0 EFI......PLEASE PLEASE........my truck is running like a$$

depending on what city your in : you could try your luck at the wreckers preferibly one that just deals in trucks and vans or just type the part in question into google or wich ever browser u use and you should get a few options hope this helps..

Is your truck knocking that bad? All the sensor does is pulls out 4 degrees timing under knock. Sounds like you need a good top end treatment if you are getting that much knock. Just back off your timing at your distributor 4 degrees or so and see if that helps...should make the base about 6 degrees vs factory setting of 10.

Some good info for some sources in this thread from another forum: Trouble Finding a Replacement Knock Sensor - FSB Forums