Why is it so hard to find r42ltsm's? Only one store has them and I rather go with something more common and just as great or better for a sparkplug. Anyone have any suggestions....... keep in mind that spending over 6.00 per plug is out of the question, so I'd be safe to say NGK's are out!
I have had my run in with neverlites, crappyons, buttsch, and noaccells. But if there's one I've missed, please run it by me!
Most part stores should be able to get you the R42LTSM's the next day if they don't already have them in stock.
As far as other plugs go, I have ran autolite 103's(they cross-reference to the stock plugs) in my TGP's before. They ran exactly the same with those as they did w/ the AC Delcos. I honestly doubt you'll be able to notice a difference between any two brands of plugs that are the same heat range, etc. NGK should have something that cross references for about $2(copper core like the AC Delcos) a piece.