Base timing. Really ?

I have been reading up on curving my dist on my 440 build.
10-1
Alum Toth heads
530 lift
248 duration @.050” (296 total)
109 Lsa
Holley 800
Tri y headers .....
My question is people are talking about 20 degrees ( or so ) of BASE timing. Give or take. It’s a general question. Is this really what some people are running on a warm street engine ? How can that not have a hard start ? From what I am learning the MSD box will knock it back to 20 degrees on start if your over that. Crazy. Just trying to get an idea of what base timing to expect. Pic for attention LoL

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