The Holley lower is 1262 Fel-Pro, it would be best to port match the heads or you will have a big step and air flow restriction which will create turbulance.
As for the PCV, run the PCV to the intake tube not to the Holley tree and it will work just fine, why do you want to get rid of it and put it in the valve cover?
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D/R 10108 NMRA Drag Radial, 25.5 chassis, F1R
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