1963 turbo fire T-55E Spark Plugs replacement

Joined
Aug 24, 2020
Thunderbird Year
1963
I have a 1963 Thunderbird 390 ci and it has turbo fire T-55E plugs in it which are discontinued . How do I find the correct plugs to change them with. I have searched and no where can I find a cross reference for theee old plugs.
 

biddle

Forum Moderator
Staff member
Joined
Mar 9, 2003
Subject "1963 Thunderbird Spark Plugs" changed to "1963 turbo fire T-55E Spark Plugs replacement"
 

57tbird57

Active Member
Joined
May 3, 2019
Thunderbird Year
1957
autozone carries a motorcraft sp-431A that is supposed to be a correct replacement. macs has a bsf42ca replacement as well for 4 bucks a piece. autozone will give you a better price.
 
Joined
Aug 15, 2019
Thunderbird Year
1966
I have a 1963 Thunderbird 390 ci and it has turbo fire T-55E plugs in it which are discontinued . How do I find the correct plugs to change them with. I have searched and no where can I find a cross reference for theee old plugs.
I think a good modern plug would serve the purpose.
 
Joined
Jun 23, 2019
Thunderbird Year
none
Sp_431A as mentioned at beginning of thread. I am changing the points over to pertronix so was going to change them anyway.
The SP431A is probably not the best choice for a 390 - it may cause pinging. It replaces a BF82 - a hotter 6 cylinder plug.
The typical 390 spark plug was a BF42. It was replaced by a Motorcraft SP420A. An Autolite 45 will also work.
If you have a high compression 390, it used a colder BF32 but that plug is no longer available.
 
Joined
Oct 8, 2021
Thunderbird Year
1965
I have a 1963 Thunderbird 390 ci and it has turbo fire T-55E plugs in it which are discontinued . How do I find the correct plugs to change them with. I have searched and no where can I find a cross reference for theee old plugs.
I have a set of 6 Turbofire T55E new spark plugs I am willing to sell
 
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