[blykins]

Total timing depends on a lot of things, including the compression ratio and chamber design. I've had modern head designs just require 28 degrees and some older stuff do best at 38-40.

The edelbrock head doesn't have the most efficient chamber design, but if it were me trying it, I'd aim for around 34-36 total.

You can always pull a spark plug and see where the band is on the ground strap and that will get you close.