Comp XE268H v Crow 18619 - 318

So are you absolutely married to a hydraulic? If you're going to go to an aftermarket rocker, why not a solid? In a tight quench, honest 10:1 318 something like this might be worth considering LA Small Block Solid Lifter Camshaft Otherwise the Isky 270 Mega or whoever is currently grinding the old Crane HMV 272 would work well.

I lean away from 1.6 rockers and super beading edge lift rates on the street. Sure they make more power on the top end. But many require some pretty crazy spring pressures. That's just more loading on the valvetrain (more wear) and a lot more parasitic loss. Run absolutely no more valve spring than you have to, less is more.