for what it is worth, bushed vs needle roller lifters
With the original build, we installed a bushed roller lifter. With the rocker arms removed the engine assembly would rotate easily and smoothly with an 18" bar on the damper bolt. As the rockers were installed, it required turning the engine with the starter to assemble and adjust the rockers. The rotation effort was very high.
After a tear down to make some changes we installed to a needle roller lifter. Now, the completed assemble, including rockers can easily be rotated with the 18" bar.
The rotation effort by hand is significantly reduced. This is an unscientific observation and may not make any difference once the engine is spinning.
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