I recorded a video but it was trash. Maybe I'll try it again.
Sounds like a well thought out build. The 3.55 + 2.74 1st would be great for me. I lost a bit of low end torque when I put on the short runner M1, so the 3.23 + 2.45 1st isn't quite as torquey as it was before. I have a 2500 rpm converter so it's balancing out a little, but I'll be happier once I get a 3.73 installed.
I wish I could cam up to what you're running, but the factory Magnum tune won't allow anything with more than 114° LSA. I'm stuck with 208/214@50 with .523 lift and 114° LSA, and factory heads. I should have bought a set of those NZ EQs 10 years ago when everyone was raving about them!