bobs old iron

Well-known Member
went to parts store, have 278? autolite, they hace crush rings on them like lawn mowers etc, guy cross refferenced to newer copper plugs, was told by tractor members no-no, bevlel plugs will crack heads when hot,, told parts guy, you can hav3e them back until i find right plugs.. do you agree,, not sure on plug #, not im my hands to look
 
Obviously, you shouldn't install a tapered seat sparkplug in a cylinder head not machined for it/that requires a gasketed sparkplug.
 

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