You can get the correct front coil springs from the Bird House or the Bird Nest. Then you will know that they shipped the wrong springs to you, or someone put the wrong set of springs in a '60's spring box. If the box they shipped those springs in says this.įord Thunderbird Front Coil Springs, Without Air Conditioning, 1961-62 Part # 66-33740-1 or 66-33741-1, then they shipped you '62 springs. He said that the '62 Bulletbird has 17" front coil springs so it is possible they sent you the wrong springs. He said many of the early Squarebirds had 14 1/8" front springs installed in them, but the front coil springs they supply to Squarebird parts houses are the later Squarebird production run uncompressed 15 1/2" springs. He also said that the information in the Ford parts book might have been correct at the time that book was published. They also said that originally, Ford was putting 14 1/8" springs on the Squarebird, but then changed to the 15 1/2" length later in the Squarebird production runs. They said their coil springs for the Squarebirds, are constructed to OEM specs at 15 1/2" 8 1/2 coils. MAC's told me that the company who makes the coil springs is Coil Spring Specialty and I just talked with them. When they get orders for coil springs, they order them in and then ship them. Apparently, like the Bird House, and the Bird Nest, and perhaps others, they do not stock them. They cannot tell me what the length of those two springs are because they do not have any in stock. I called MAC's, and talked with one of their reps. If they sent you front coil springs for a 430CI car, they are still the same length, just thicker, heavier duty springs. It was explained to me that it does make a difference in coil construction for some cars, if a car has AC, but not for our old Squarebirds).įord Thunderbird Front Coil Springs, 352 V8, With Air Conditioning, 1958-60 Part # 66-31100-1 They said that the coil makers are used to specifying that they are non-AC coils or AC coils. Or if you have AC (though the Bird Nest told me it does not matter if you have AC or not. What does the part # say on the box the springs came in? It should say this.įord Thunderbird Front Coil Springs, 352 V8, 1958-60 Part # 66-31099-1 If your coil springs from MAC's are 17" they sent you the wrong springs. 14 1/8" 8 1/2 coils uncompressed, or free length is correct for the Squarebird according to the manuals put out back then. According to what I have found out talking with a couple of our Tbird parts vendors is this. I have been doing some research for you on 1960 front coil spring lengths.
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