I have a short deck wet sump r3 that I am putting togeather. I know you can oil this block from the front or rear. Was thinking about running a external filter and putting oil back in both. Was wondering if anyone has experience doing that.

I've never seen a reason to oil from both ends. I know it's done, but what's it get you?

When I built my R3 block several years ago thankfully I posted some pictures on Moparts. A member (sorry I don’t remember who) messaged me and told me the holes drilled in the valley for drainage needed to be bigger. I drilled them bigger and also bought an accumulator from him just Incase my pressure dropped. My RacePak showed my pressure was steady so I never installed it. Double check yours before it’s clean and going together

Putting oil in both ends of the galley on my LA - as opposed to one end only and making it run the gauntlet of lifter bores and feed passages before it gets to the other end - made a big difference in keeping the bearings happy. RPM is a big factor in how much attention the oil system needs.

I did have the valley opened up for drainage. If I remember right the front port is 1/2 pipe and I think the block can be tapped 3/8 pipe by the filter base. I've read that oiling the front will give more supply for the mains. Was kind of curious how others plumbed it. I'll probably end up with a oberg filter with 2 exit ports.

I run a short deck r3 w8 deal, mine was dry sump. I converted mine to wet, no room for dry sump. I run mine front and back as I didn't see any reason to not. Not needed I'm sure, I did, works just fine.

You might go to www.moparchat.com then scroll down to & click on "circle track chat" then read thru Sanborns' oiling mods that are in a sticky at the top of that page. A long read to absorb it all but for sure worth your time.

Oil to the number 1 main first instead of last...

Mine is split and I oil both ends, dry sump, but doesn't matter.
I can't see a reason not to do it. Worst case, it does little to nothing, best case, it extends bearing life.

I have mine torn down for mockup/new heads/new motor plate, but you can see how the raised port heads helped give me clearance. I had a short 90* on it before with standard port heads and this is a tall swivel. I'll probably trim away a little more of the intake to kick the fitting about 45*. End rail spacers are not in obviously!

I’ve just gone 3 years on mine blocking that front port off running alcohol so I will see shortly during rebuild how my bearings look.