Old plugs won't work with my GT40's?

[pwcracer]

I had autolite 24 in my E7's and they won't go into the GT40's.. It seems the part right above the threads is too fat. is there another plug i should use (Kenne bell rec the autolites)

 

[rd]

The plugs from my 79 heads would not work either.

Get plugs for a 93 Mustang Cobra 5.0, they fit.

 

[Mustang5L5]

Autolite 764's

 

[pwcracer]

Thats just what i found out at my local parts store, but i wanted 1 range colder for the blower, which would be a Autolite 2543 and i was told they no longer make them. I could get Champions, but Kenne bell doesn't rec them at all... Hmm...

 

[Mustang5L5]

What are the motorcraft equivalents??

I think the stock plug is 42C (or could be 32C....one of those is for E7's and the other is GT-40P) and then look up 1 range colder for that plug.

 

[stanglx2002]

autolite 25's is what i have in my GT40's

 

[50bomber]

My GT-40Y use ASWF-32C, which is an extended tip spark plug, one rangle hotter than stock.....When I had the heads off the car, i tried playing around with old plugs from my E7s and the tip does not extend far enough into the cc, its shrouded in by the thread by like 3 mm. not a good thing. Do yourself a favor and get correct plugs, they are only like $1.49 a pop at Pepboys.

 

[super302]

Autolite 764's

 

[millhouse]

Autolite 764's are the stock plug's for the gt40's and gt40-p's.

One heat range colder would be the autolite 103's. Thats's what I run, and the work great!