Slant 6 timing chain lubrication?

MV8 said

There is going to be some oil spray with no mods. This would be a cooling improvement for the timing set. I would just take the corner off (same angle you used), and take off no more than .040" from the corner (compare to unmodded depth, corner to notch). You can check with a straight edge across the rear side corner and a feller gauge or use the end of a dial caliper or depth micrometer). Want to make the most of what oil is available to go around everywhere from a standard pump (that the drive can handle reliably/long term).

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There will be zero "oil spray". "Spray" is indicative of pressure and there's zero pressure on the timing set without the chamfered front main bearing or the drilled main oil passage plug, so the more accurate term to us would be splash oiling and it's danged poor splash at that. I've run engines before with the timing cover off for diagnostic purposes in the past. Although I've never done it on a slant 6, I've done on it Chevy, Ford and Mopar V8 engines. Each time, there was so little oil splash, there was almost no mess to clean up. It would surprise you.