If you just couldn't do oil mods, what's an alternative?

So, putting together a bracket car, nothing super serious competitive wise, just to expose my three young teens to the racing culture and have fun getting back into the sport after being out for a long time. Building a 440/512 stroker, 650hp, 10.6 comp, solid flat tappet, planning on keeping the rpms at 6000, never over 6500 to get her to live a long happy life. I need to get a hold of 440 source and ask them what bearing clearance they're stroker kit is to see how much a HV would be needed in that respect if the bearing clearance is on the bigger side, I'll obviously check the clearance later.

My concern is I don't have a machinist that specializes in mopar anywhere near me, and I'm just not confident in drilling this, and plugging that in my block for oil mods. At most I'm kicking around the idea of drilling the pickup tube to 1/2", but I'd have to return my new pickup tube I bought, but that's of course not a big deal.

So, I guess what I'm asking, will a high pressure and/or high volume pump help band aid the lack of block mods? I've spend untold hours reading and asking, and I get every answer across the board. So, is it worth going with the HP/HV pump? Seems I get told to do the HP only, more than anything. I'll be running the 440 source's A-body clearanced 6qt pan and they reassure me I won't suck the pan dry with a HV pump racing.

I understand this question gets asked in different forms from time to time regarding more mild rebuilds, but figured I thought I would get a fresh perspective.

Thoughts?
Only oil mods i made on my street/strip 511 were drill the oil galleys #2-#5 to next size. Mine had some slag in them and drilling made a nice round hole to the mains. I used a Milodon pump, I think volume is better than pressure. I used a windage tray and thats the only mods i made. Been running 4 seasons now with 7100rpm thru the traps. Use good oil, Amsoil, Brad Penn, Driven for instance. One other thing, I used the standard size pick up tube and reamed it out a little bigger.