I'll be interested to see what you run with your 505.
I also built a 505 but it's also on hold while I wait for the Victor heads to get back from porting.
For my combination I'm looking to see some 10.5 time slips, and anything quicker than that will be bonus.
The combo I've put together is also a 505 but with:
Edelbrock Victor Max Wedge heads - full port, will have before and after flow numbers when done
12.7 CR
274 / 282 @ 050, 672 lift solid roller
Indy Cross Ram with 750 Eddies.
Dynamic 5000 converter
Pro Trans with brake
Dana 4.10
3400 lbs less driver.
I also went with the ultra light crank, aluminum main caps, stud and girdle to help hold it together.
Check it out.
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The last picture was taken before engine removal a few months ago.