It has been many years since I have built an LA series engine.
I've torn down several but assembly is another matter. The last few builds that I have done are big blocks. With those, every time new cam bearings are installed, I've had to run this through to clearance the bearings:
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It has diagonal grooves in the journals packed with bearing grease.
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After this "clearancing tool" makes several passes, the good cam is able to spin in the block. Before, it cannot. MY machinist said that this is common with the big block Mopars. Is this a known issue with the LA and Magnum blocks too?
If so, I'd need to pull a cam from a spare engine and modify it for this.