Valve spring question
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Yes, but you need not run the "high lift" top collars. You can use the stock H-D top collars, because you do not need the extra spring travel. If you use the collars pictured, you MUST provide clearance in the rocker boxes, by grinding away material from the inside, just above the gasket surface. Do not grind all the way to the gasket surface, leave it intact (that mistake was made many times in the old days).
Jim -
For the other readers, and the newbies:
That solution is possible because the stock springs and the Andrews springs have the same coil bind measurement. And I know this for a fact, having used dozens of sets of each. I would not recommend the above if I did not know the particulars for certain. The Andrews springs have greater pressure across the board, both seat pressure and open pressure, but work fine with the stock cam and hydraulic tappets. They are inexpensive insurance for old shovel (or pan) heads.
JimComment
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Yes, any non-stock cam, measure everything and leave nothing to chance. On pans and shovels, this admonition includes the so-called bolt-in cams.
JimComment
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What you most likely have is the mid-year changeover ..
1948 to 78 was same guide O.D.
79 to 84 was the "Fat" guide years ..
... /// https://youtu.be/t2mU6USTBRE \\\ ...Take my 45 and outrun em all ..Comment
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