Thats a very nice gain for a .035 larger valve and a competition valve job, I have to ask what happens with the .050 {2.080} larger valve and the 5 angle valve job ?
Glad you able to use those springs.
I did my set of 2.08 heads around 10-11 years ago. They were a damaged set of open chamber heads I bought off Moparts for around 300.00 and ported them for a friend. He never used them so I bought them back. Back then I struggled with high lift mild turbulence but they flowed 318. The updated set I’m now working on for my car are in the 330cfm area. So I’ll gain compression and flow. My old set is on my 408 now and has gone 5.98 so probably a very low 9.30 or high 9.20. I’ve learned a lot over the last year with my valve seat machine.