What distributor do you run?

mopowers said

What is the actual measured compression? Using "10.1 pistons" doesn't necessarily mean the actual compression ratio is 10.1. Have you measured it?

I'd figure out what the engine actually wants for initial timing before worrying about total timing or even changing anything, parts-wise.

Click to expand...

^^^^This is the correct strategy^^^^^^
Once you know what is there by measuring the timing at different rpms, starting at slow idle, you can make decisions on logical changes to test.

While people are doing shameless promotions, I'll promote reading up on what timing does.
Post from this thread: total timing reading accurate with no load?
And How To Limit and Adjust Chrysler Vacuum Advance Cans
along with Distributor starting point for a curve for non-factory setups

Then when its time to make changes, if any, you can decide whether to do it yourself like this guy did, or send it to someone like @halifaxhops.