Update. I was wrong on the valve cover rail. Measured both and they are the same. PAC valve springs set up up with thinner (I think 0.030" thick) spring locator seats, and +0.100" (I think, I did not measure them) Ti retainers. Used the stock Edelbrock valves and the PAC 1326 valve springs. I think we are around 1.950" to 2.000" install height according to the cylinder head guy I went to.
We milled the rocker stands and are using the MaxWedge type rocker shaft stands. Installed 3/4" long timesert thread inserts for the center stand, and using studs to attach the rocker shaft. Just ordered 3/8"x0.145" wall pushrods, 9.080" exhaust, 9.138" intake length from Smith Brothers.
That was all I needed to finish the engine.