Did you mean schraider valve, as in the valve that holds air in the tires? There is also one underneath a small green cap under the hood on newer fords and gms for evac system, Also on fords and gms you may locate one on the fuel rail for testing purposes.
15426378 ----------------------------------------------------------------------------- If it's Fords 5.0 L ( 302 ) HO , it's ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )
Fits many Fords.
All standard 302 Fords are 1-5-4-2-6-3-7-8 except the 302 H.O. engine which is 1-3-7-2-6-5-4-8
10 degrees BTDC according to motorcraft.com ( one of Fords websites )
.054 inch according to motorcraft.com ( one of Fords websites )
fords 302, chevys 305. one of the most popular one i would say is the mustang.
According to one of Fords websites : For a 1973 Ford Bronco 5.0 L ( 302 cubic inch V8 engine ) ( The spark plugs are gapped at .035 inch )
According to one of Fords websites : For a 1986 Ford Mustang , 5.0 L / 302 cubic inch V8 engine : The spark plugs are gapped at ( .050 inch )
According to one of Fords websites : For a 1968 Ford Mustang 5.0 liter / 302 cubic inch V8 engine : ( the spark plugs are gapped at .035 inch )
Fords 5.8 liter engine is 351 cubic inches ( Ford calls there 302 a 5.0 liter and there 460 a 7.5 liter )
Because their are 2 versions of the 5.0. Ford bult a High Output version of the base 302 called the 302 HO. That engine uses the 351 firing order. After some experimentation it was determined the engine ran better using that firing order instead of the standard 302 firing order.
15426378 - Same for all small block fords... 351 w is a small block but has 1-2-7-2-6-5-4-8 also all 302 ho have this firing order.Ford did not make the 302 in 66 so its either a 289 or or a late 67