What spark plugs do ypu prefer
 

I usually go with Motorcraft or autolite, but I don't know what choices there are. All I know is what the computer at autozone says will fit (like 5 choices). The plugs I see some of you guys running I don't know where to get or what will fit?If you say "hotter than stock" the kid at a-zone might as well be selling matresses cause he don't know what your talking about!
What do you gurus use and what do you gap them to?
Thanks
Wes

autolite for 5.0

Which autolite? because after I posted I remembered that the autolites I got from A-zone are longer than the motorcrafts and make the wire boots touch the headers on a couple of cylinders
Headers are only 1 1/2 unequals, boots are 45*,should I maybe use straight boots? Stock ones are angled aren't they?

i just use the autolite for a stock 5.0. i forget the part # offhand, there is a part # serch engine on autolite's web site, check it out. i gap the copper plugs to i believe .054 and never had any probs.

Upon further inspection the only hole that requires a shorter plug is #2 I have to use a bosch super $.99. Any other listed plug for my car is longer than the B. super & the longer plugs puts the boot right on the header tube!!
I guess I'll have to get 1 wire with a straight boot?

.99 cent autolites

Autolite is #1 in my book. Motorcraft are a good OE plug too.

You should not have header clearance issues with 1 1/2 unequal shorties. I have 1 3/4 longtubes in my 351 car and run motorcraft 450's or autolite 24's. Gapped at .054. In my 302 car, I have BBK equal length shorties with 1 5/8 primaries and the same plugs with no clearance issues. The stock wires are angled 45 degrees. What kind of wires do you have?

BTW, I have better luck with the autolites over the motrcrafts. Autolite gets my vote. Bosch supers suck ass. Even Champions are better than them.

My wires are stock replacement 8mm dbl. silicone from a-zone, 45* boots, they're lifetime warnt. so I change them about twice a year.
I agree that bosch supers suck but they're short so they will work in hole #2, all others have motorcrafts in them right now.
I need a good plug thats as short as a bosch super or a straight boot on that wire.
Is it possable to put a straight boot one that wire? Can I buy just a boot?
Or should I crimp that header tube for clearance, I't wouldn't take much.
Thanks guys!!

Good old Autolite #3924's for my 331 stoker! Just the plain old copper ones.

E

302 LX Eric,
Do you run stock heads, intake , cam?

NGK's are generally regarded as the best plug around for the money and what I would recommend.

Autolites here:cool:

No. I run TFS TW heads, TFS Track Heat Intake and an Anderson N-41 cam...all with Autolite 3924's :D

E

So out of curiosity, what makes a plug "bad" or "crap"? It's just a rod of copper in a ceramic insulator and some threads to screw it in with. What makes some plugs "better" than others?

I would say quality of construction would be a consideration. I had a whole set of autolights develop a "rattle" to them. When I shook them, they would sound like something was loose internally. I have tried to avoid them since.