For oiling mods I would make sure you have an oil pan with baffles and extra oil capacity.
I would run the larger oil pump drive.
I would also enlarge and smooth the oil pump passage where the oil pump bolts on. I don't recall the size, maybe someone will chime in.
On the block after pulling the heads I would check the deck height. If the pistons are down in the hole I would have it decked to bring them up to the top.
I would measure all four corners to see what you get and go from there.
I'm assuming you've done something with the rockershafts, if not I would add spacers and end stands.
You could have a mild port and clean up done on the Edelbrock heads, might be more than your budget though.
It all depends on what you want to spend.
I think you could go a bigger cam, something around 230ish dur at .050 hydraulic, or 240ish dur at .050 solid.
I'll let others chime in on the camshaft specs.
And as long as you have it apart I would degree the cam, new or old.
Lastly I would highly recommend buying Jay Brown's book and Barry Rabotnick's book.
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