It's not even going to fit, the Ho intake and the renix head are radically different in the intake side. I don't think you could get the HO intake to clear the exhaust manifold on a renix head, no matter how much shaving and welding you do. Besides, the head on the Renix is the limiting factor, that's why Chryco redid it and named it the HO. They raised the intake porting for a better flow into the cylinder and got an extra 20 HP out of it.
If you want the performance the best bet is to just swap an HO head complete with intake and exhaust manifolds, then adapt the Renix TPS to the HO throtle body. Easiest way to get from here to there, and if you use the HO exhaust manifold then you don't have to make an EGR block off plate, and you can easily delete the EGR system. You can use the HO fuel rail and stuff too, which is a better (sturdier) design than the Renix era part.