Anybody tried these brakes

Yeah I'm going efi Hemi 265 Turbo (+/- 450-500hp)
Streeter but it's going to be much much fun
Will get a rear disc setup with a TSD-500 helical gear diff but may have to go Wilwoods.
The issue is that I'm paying 13 times for the Dollar plus 40% import duty so trying to budget but get the most bang for my buckaroo!

Those Helix are cute but I think they might be pretty heavy and they only work with big GM single pots