EHSZ06

I am going to change out my spark plugs and wires tomorrow and was just wondering what spark plugs you guys were running. I was also wondering what gap I should set it at? All I have right now are longtube headers so I don't know if that makes a difference in what gap I should set it at. Thanks guys!

EHSZ06

Nobody can suggest a spark plug and a gap size?? I realize it is personal preference but I would just like some suggestions

falcon5619

I beleive it depends on the actual plug you purchase. Many use the NGK TR55, which has a .55 gap. Most leave this gap as is. If you use an iridium plug, the factory gap may be different, which most leave as is.

The Wanderer

As found in your friendly owners manual ...

6-76
Normal Maintenance
Replacement Parts
Engine Air Cleaner/Filter A917C* . . . . . . . . . . . . . .
Engine Oil Filter PF44* . . . . . . . . . . . . . . . . . . . . . . .
PCV Valve CV948C* . . . . . . . . . . . . . . . . . . . . . . . . .
0.060 inch (1.524 mm)
Spark Plug 41-974 (0.060 inch Gap)* . . . . . . . . . . .
Windshield Wiper Blade
Length 22 inches (55.9 cm) . . . . . . . . . . . . . . . . . . . .
Type 9 mm x 3 mm Shepherd’s Hook . . . . . . . . . . . .
* ACDelco
part number.

Bigstik

I use the Bosch Iridium Fusion plugs. $8 a pop with the factory gap settings.

BlueRag

I use NGK TR55IX gapped at ~.056"....... I've been using them for about 4 years in the two different Vette's I've owned.

jbauch357

I run headers so it's pretty easy to swap plugs, for that reason I run NGK TR55 copper core plugs and replace them every 30k or so. At under $2 per plug it's pretty cheap to do too. Oh, I run 0.060" gap on mine...

Sigforty

I ran the TR55 at a .055 gap for a long time. Now I am running TR6 plugs at a .035 gap due to the amount of modifications I have.

EHSZ06

Just purchased some of these today thanks for the advice guys