My 82 Mazda has a spray bar over the cam and it's an OHC so I'm sure it's needed as there is no crank sling on an OHC. I've never wiped a lobe ( knock on wood) but I don't deal with battleship springs or wild lifts either. Spray bar would be easy to fab up. Just a small closed end brass pipe with some strategically drilled .010 holes on the underside plumbed to an oil feed. Mount on bottom of a Moroso lifter valley pan, bottom of intake or rigid directly across the valley above the camshafts. R blocks need not apply as they have a restricted camshaft exposure valley. 340 shown with all it's camshafts oiling access.
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