Roller Cammed 318/360

Rumble: I would think the machine work that may be reqiured would easily offset the cost of retrofit lifter.

I'm missing something. Extra ( $$$$) machine work to fit in a roller? Some or all blocks require clearanceing for the lifters. I'm not to up on what lifters need what or how much of anything.
Lenwiler (SP?) is doing a R block with roller cam. Look at his thread.

Could there be a way to tap into an oil galley and still run W-2's, W-5's etc?

The machine work on a Magnum?
On a Magnum engine block, you can drill out the oil passage way to oil feed a "LA" head. This is not a problem so long as the drill bit is long enuff. ;)

The Machine work to my non-magnum roller block.

The machine work required for my MP short block will start with re-decking the block and finishing up with a full blue printed block. I guess I could cheap out.....he he he.
From there, I hope the decks aren't in the basement as such to cause extreme head milling. I'd like to be able to just swap intakes at will if I could.
Also, if I had it my way, it would be LP Comandos on top of a roller cammed engine. But it is just a pipe dream at this point.

I'm guessing that you dont want to go with a true Magnum block due to the head limitations?

They can be overcome I believe. But with the amount of "LA" head gear I have, why bother at this point.
I would get a Magnum engine and drill it out and go from there.
You could slip in a older engine block roller cam and just fit a older cover. (Thicker than a magnums)
To add mech fuel pump, just follow the rest of a OE style set up of the older engines.