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Thread: Ok to use spark plugs that are not all the way through the threads in the head???
          
   
   

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  1. 04-15-2007 12:28 PM #1
    billlsbird
    billlsbird is offline CHR Member
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    Car Year, Make, Model: '32 Ford 3 Window Coupe w/ 392 Hemi
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    Ok to use spark plugs that are not all the way through the threads in the head???

     



    ......asked a question yesterday r/e "what plugs should I use?" {I ones in there are bad & special order. Autolite # AR 3911}. combo is 413 small block Chev, 230/236 @ .050 cam, 750 Double pumper, air gap manafold, 10 to 1 compression.... Eric E. recommended the AC 44 or 45's. I got them this morning but they are 3/8" shorter than the plugs that were in their. Yesterday I FORGOT to say that I have AFR aluminum heads. May be aluminum heads have more threads than steel heads??? Anyway the plugs that I got today are so short that the electroid would just barely be inside the cylinder. Is this ok until I get the special order plugs??? If so great, If not can anyone recommened a plug that would work thats longer??? THANKS Everyone, your all life savers Bill
    Last edited by billlsbird; 04-15-2007 at 01:05 PM.
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