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12-28-2015 03:27 PM #1
CHR Member
- Join Date
- May 2003
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- Zephyrhills, Florida, USA
- Car Year, Make, Model: '32 Henway
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Verifying Jerry's statement that the crank sprocket was the change, I went to Cloyes website and gleaned the following info....
1975 Mercury Montego 460
S420T cam sprocket
C493 chain
S421 crank sprocket
1968 Ford Thunderbird 429
S420T cam sprocket
C493 chain
S493 crank sprocket
I also found that the cam sprocket is 36 teeth, so one tooth of the cam sprocket is 10 degrees at the cam, but 20 degrees at the crank where cam timing is figured from. The crank sprocket is 18 teeth, so one tooth at the crank sprocket would be also be 20 degrees at the crank. So, even an 8 degree offset bushing wouldn't put you where you need to be. Use an S493 crank sprocket or a complete C3037 timing set for a '68 Ford Thunderbird 429.
.Last edited by techinspector1; 12-28-2015 at 03:42 PM.
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".......So sanded it all down and resprayed. ......" Been there. done that on a couple of paint jobs over the years. Usually took me a couple of days to get over being mad before I started...
Stude M5 build