I just noticed you stated the cam is a MP 292 cam?
That’s a pretty big cam in a 360.
You will want a carb with 4 corner idle.
Nothing from Edelbrock would be on my list of recommendations for that combo.
Even the Speed Demon, which has 4 corner idle isn’t a good match for a cam that size(it’s listed for use with cams up to 240@.050, and that cam is like 246@.050).
I’d be looking at a Holley Brawler 750.
As for the timing........ you’ll want to run plenty of initial timing.
20*......at least.
The issue will be, you’ll need to have the amount of advance within the distributor limited, so the total timing doesn’t go too high when you’re at 20-ish initial.
Depending on exactly what the distributor is, it’s either an easy adjustment....... or something requiring surgery.
