604 valve springs

[cam3]

i put a 604 in my vintage car to race not to just ride around and wave at the crowd ,,,, there are no motor rules ,,,, run any motor,,,,the issue is what valve spring can i put on the motor to replace the stock ones that will run as long as a racing valve spring,,,, on the racing motors we run them all year with no problems thanks for any help C3

[SLM98]

Comp-Cam has a spring that is the clone of the stock spring only better material. Cost is around $200.00

[hot rock]

pac raing springs.com 1.866.799.9417 hope this helps.