[Will]

sounds okay but that's a really fast curve. If it works, it works though. I'd be more focused on your total timing, you may not need that much. If you can get it on a chassis dyno or out to a test & tune day at the track I'd try backing it off two degrees at a time and see what happens. For pump gas you might want to slow it down a bit too. Try pushing the total all in point back to 3000-3200 RPM.

My last engine with 061 heads that have chambers which vaguely resemble the 614 chambers didn't pick up any power with more than 34 degrees and I ran into detonation running it at 38, which I only did because the curve was too long and it was more responsive with more initial timing.