I agree with burnin4. Him and I appear to be on the same road together and it is a road that sucks to travel.
The OP said he already has the Perrin rotated kit. Why not just buy the 35R and bolt it on to the kit. That’s what I did. I was making 390whp with the 30R, bolted the 35R and made 510whp. This is on a low reading dyno. Take my car to a Dynojet and I would have made 550whp+. All I had done to the motor were CP pistons and ARP head studs. The Perrin kit works. Yes, it has some flaws, but it does work.
Drop the 35R on your current setup, tune it and run like that for a while, you make 500whp and go low/mid 11’s on it. If you’re still not happy, then decide what to do.
But you will have to invest money into other issues……drivetrain, fuelling, etc.