I can see if I have one in my parts box but just the length won't give you all the info, they are VERY light springs and calibrated for specific applications. OK, I went out to the barn and looked in several drawers but could not find a loose power valve spring. I would have to take a carb apart to measure one. You might be better off with no spring at this point as it will keep the primary rods in the lean cruise position, if you have a spring that is even the slightest bit too strong you will be in "power valve" mode all the time.

Last edited by 78buckshot; 04/22/2022 4:17 PM.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy