I would agree with talking with Dan@ DLS 219-956-3653
I personally ran a 70 & 72 turbo, 274ci, 200R4, with a Billet Hyd Roller set-up for street/strip from Dan years ago with great results.
I would think something in the 224 to 230 deg Billet Hyd roller range should work fine with the BB turbo's & stall.
The 83's would be ok for the 70, but not for the 76. I would just put 95-96's in.