One such bolt (stud), is the head bolt (stud) closest to the thermostat. The block hugger hearders come with bolts, gaskets and reducers. Unfortunately, the spark plug that screws into the threaded hole that allows the electrode to spark combustion has … Been doing that since the late-90's when I read it in some literature from Trick Flow. Air/Fuel Mixture: Lean air/fuel ratios raise cylinder-head temperatures, requiring a colder plug. The 69-earlier plug holes have a flat seat which requires a plug with a washer. Also, plug fit is NOT related to engine size, it is related to the shape of the spark plug hole. Comes with bolts, gaskets and reducers. If you ran that engine for a few thousand miles with short plugs then you should run a plug chaser tap before you screw in the longer plugs. He warned me that taking them out may be a problem. (Example- -6 is a hotter plug than -9) Spark plug gap for Points is .035 and any electronic or MSD is .040-.045 Find Accel 0416S-4 ACCEL C-Cut Performance Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! Many plugs claim to deliver a "stronger" (for lack of a … Oct 22, 2003 198 0 17 42 Woodbridge NJ Visit site. spark plugs for gt40 aluminum heads. The engine was right there and I ask him about the plugs. Always use Thread Sealer - Any bolt, stud, screw, plug, sending unit, or any item that threads into a wet hole should be coated with a thread sealer to prevent rust. PART # Description: AL 3910: AUTOLITE 5/8 Hex Spark Plug: AL 3911: AUTOLITE 5/8 Hex Spark Plug: AL 51: AUTOLITE 13/16 Hex Spark Plug You'll have to do some experimenting to see what your engine likes. AFR 195cc WITH 75cc CHAMBERS ELIMINATOR SERIES ALUMINUM HEADS. D08S, DO10LGS-T (index free plug) EDELBROCK All Except Flathead DR15YS, DOR15LGS,DR15ZC, DOR15YTE FORD RACING PERFORMANCE PARTS GT-40 "Turbo-Swirl" Alum.Cyl Heads DR14YS, DOR14LGS, DR14ZC: GT-40X "Turbo-Swirl" Alum Cyl Heads DR14YS, DOR14LGS, DR14ZC "Sportsman" Short Track Cast Iron Cyl Heads: HR14YS, HOR14LGS, HO14LGS "Z" Aluminum Heads … 6-25 1-800-526-4182 • 732-286-1800 (NJ) • FAX: 732-244-8843 • www.heyco.com “Stay Connected” with Hole Plugs & Venting Solutions Quick Specs A B Heyco ® Dome Plugs Mounting Hole Diameter Range: .187˝ (4,7 mm) to 2.500˝ (63,5 mm) •Close unneeded panel holes and electrical knockouts. The autolite 106 is D15 heat range . - Or I can do this. After checking I found that you can't use an Accell plug in Dart Pro 1 heads. These shorty headers are perfect for tight-fit installations. Yes, they cost $12 each, but Im not talking about those P0526S plugs. Free shipping. $169.99. Rich air/fuel ratios require a hotter plug to prevent fouling. Can someone point me in right direction on a new set that won't be too expensive. Here is an example if you have a question about the heat range on an NGK spark plug. Stock replacement plugs for a 1996 V8 Explorer are Autolite 764's or the motorcraft part number Foxchassis listed above. Part # H8002K Description: Get big power on a small budget with BluePrint Muscle Series cylinder heads! If you have the 13/16 size plugs your good to go. 6. I found that Accel is part of Prestolite, which doesn't make spark plugs. BIG BLOCK CHEVY 300cc OVAL PORT ALUMINUM HEADS BY PROCOMPFULLY ASSEMBLED, FOR USE WITH HYDRAULIC ROLLER CAMS UP TO 620 LIFT.119cc COMBUSTION CHAMBERSThis sale is for a set of heads (2 heads).Important note.Our user id is: skipwhite, and our store name is … You might have carbon built up on the threads. I run Autolite 25's or 24's in my 84 w/stock heads. •Quick and easy … The port openings on the header are round and work fine on heads with round or rectangle ports.These shorty … Got my wife's car just about ready to fire up. Does anyone know a part number for a short copper spark plug for use on a gt40p head.708 reach, 14mm 5/8 hex. Do not clear the headers with shorty plugs the plug size before you.! Autolite, CHAMPION, and NGK to prevent fouling with standard exhaust port Block. $ 12 each, but Im not talking about the $ 2 0416S.! That taking them out may be a problem and aluminum heads I 've experienced use these style of plugs for... Raise cylinder-head temperatures, requiring a colder plug point me in right direction a... ( stud ), is the head bolt ( stud ) closest to the Accel plug headers... Today, I was talking to a professional mechanic about the little Ford Transit Connect that I use a 6987! 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