Spark Plug Question

Bub

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Okay so my new heads (Windsor jr) calls for 14mm 5/8 .40" reach tapered style, Accel #276 or 276s or equivalent.

When I go to cross reference I see Motorcraft AF42. Can anyone help me make sure I purchase the correct plugs? Thanks!
 

Bub

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Thanks for the replies, I went to Oreilly yesterday and they cross referenced accel #276 and sold me the Autolite 26, which looks like its a step hotter than stock? What advantages/disadvantages am I looking at?
 

rz5.0

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I would go with what is recommended. Too hot can cause preignition

Enviado usando mi SHP-L710 usando TapaTalk
 

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