Need new valve springs for my M&A heads?

[forcefed3.8's]

The car runs pretty close to the cutlass. It has only been down the track 2 times, 10.3@130 on low boost, still tuning with the sd2 chip. The 65 turbine chokes long before the 66 turbine will. The limit on his combo is the heads.
I would have your springs tested. You are limited on pressure with the flat tappet. Not sure if you can get enough on there to make the power.