This video is one I made on setting up the valve spring installed height on the Ford A3 heads, on the 409 Cleveland I just dynoed a couple of weeks ago. I must have done it correctly, as the engine went on the pump, and pulled past 7600 rpm, without any hint of valve float.This is something, I was taught by Donn Rhode, and have only done it 3 times. The installed height for these Pac 1225 springs, in my application is 1.950. It is not difficult to do, but is a of trial and error, make sure you have a good shim selection, and a strong valve spring compressor. Always be careful when working with any spring under pressure. Take your time, and keep things clean. Good luck with your next build, and stay tuned.
https://youtu.be/donrXWBKFdE
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