Crankshaft Oil Slinger is it a must or not???

So i got curious, i have a Magnum 360 core in my garage i opened it up this morning and it also dose not have a oil Slinger ...........WHATS UP WITH THAT...............

Thanks for every ones help.............................. PETE ...................................

Magnums used a timing chain tensioner that has a drip tab to drip oil on the chain. If I remember right early LA's also used a drip tab, just no tensioner.

I like to use a slinger cause small block chains are so long they seem to get slack in them quicker if they don't get oiled good. The stiffer the valve springs are the more load there is on the chain/gears