Hmmm.... 'The Bat' is correct... IF you are using the original FoMoCo 'usual production' y-block valve spring retainers. The FoMoCo two piece valve spring retainers were designed to cause the valves to rotate during normal engine operation to prolong valve life.

However, IF you have original '57 'E' or 'F' code single piece valve spring retainers, OR aftermarket single piece valve spring retainers from performance camshaft kit or component suppliers, the valves do not rotate and therefore the valve keepers retain their 'as installed' orientation.

Perhaps Ted, John Mummert, or McTim will have a comment as to whether they pay attention to valve keeper orientation on single piece valve spring retainers when they assemble cylinder heads having them...

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

In a perfect world,the valves rota some and so do sping ect,so no don't matter,kind of like putting in rings,good the be sure there stagered gap wose,but they do move when new running

"The Bat" out of hell

50's & 60's hotrodder

retired speed shop owner,built and design hotrods, racecars

airbrush t-shirts, engine balancing

Miami fl.

Does it matter which way they go and what are your opinions? should they be parallel to the rocker or 90* to the rocker?

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?