AC Delco plugs

[etriebe]

hello I was Just wondering about plugs. I was going to build up a tuned port engine for my 88 2wd jimmy so i bought a bunch of parts to do the swap. bought a typhoon instead and never finished so I sold the truck. I've got these rapidfire plugs sitting on my toolbox the part # is #2s. I don't know if i should use them though or just go buy some 42ts's

 

[JSM]

Re: AC Delco plugs

go buy some NGK's instead. UR-5 or TR-5 depending what heads you have.

 

[Loeryder]

Re: AC Delco plugs

UR5 = stock or L35 heads, stock heat range
UR6 same plug design one step cooler.

TR is the vortec plugs i believe, but I don't have vortecs yet so don't quote me on that.

Toss those rapid fires on ebay or whatever, but I wouldn't use them in a boost truck.
Maybe a NA 4.3 beater truck that you don't really care about.