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I have 2 sets of Manley nextek triple valve springs. Part number is 221451-16 These were used in a 638 pulling engine. spring specs are [email protected] [email protected] spring OD 1.677 spring ID .635 coil bind 1.180. Both sets of spring are in very good condition.The springs have been bench tested and rates recorded. New these spring are over $700.00 I will take $200.00 for both sets of springs and the camshaft, camshaft has app 20 passes in a 4x4 pulling truck and is in excellent shaps. PM with any questions. I will add pics later



Engine: 429-460 Ford
Cam Grind No. R-1759-1764-18-4A

Intake Exhaust
Duration at .050 289 308
Lobe Lift .525 .470
Lobe Separation 114 122

Intake Exhaust
Seat Duration at
.020 322 347

Gross Valve Lift Ratio 1.8 .945 Ratio 1.8 .846
Valve lash (HOT) .018 .022
Degree #1 Intake Lobe to 114 ATDC

Spring Requirements: Triple

Loads Closed 350 LBS Seat
Open 1050 LBS Open
 

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