Quote:
Originally Posted by SSDiv6
Mushroom lifters were used in the early days of NASCAR, allowing camshaft profiles with more aggressive lobes. Direct Connection used to sell mushroom lifters for Mopar applications and also the required tool to modify the block.
Many years ago I heard the story of a racer that was running mushroom lifters in 15 lifter bores and left one bore with a normal size lifter in the event he was asked to pull a lifter to show tech.
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Seemed to me that an old GM Performance Parts catalog used to show a mushroom cam and lifter for a small block. Also, doesn't the tech guy sometimes tell you which lifter to pull at random?