[25stevem]

Not good with .005” undersized chain!

You now have likely taken out most all of the needed oil clearance on the crankshaft side of that front cam bearing, and also you have progressively reduced the oil clearance on the top side of the cam bearings on the way back to the rear of the block.

I have measured this once with one of my motors after a slight line hone was done.

I had both a standard and undersized chain and I used my magnetic dial caliper to check how the cam was loaded and in turn rocked from front to rear as I installed both chains.

All I can tell you is that I decided it was far more prudent to go with a looser fitting stock length chain and then did my normal advance the cam 2 degrees thing to compensate for normal chain stretch.

I did not recheck with a degree wheel after I did that, but I guess my normal 2 degree advance ended up being only 1 degree.

As with any type of clearance in a motor it’s better to be a hair too loose then too tight!