The main caps are in order front to back. 1-2-3-4
Numbers 2 & 4 Main Caps have the windage tray main stud bolts.
Look at the block main on #3 The groove for the thrust bearing machined into the block.
Then look at the #4 Main cap. There is the other groove for the other half of the main thrust bearing.
What the heck? Has anyone ever seen this before?
PLY478
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Ok LA Fans Explain this one to me......