I run a 622 bbc with a dry sump and bought a billet plug from MSD.part # 8512.it looks like a complete distributor from the manifold height down.has adj sleeve for different block deck heights. if all else fails,take a old dist cut it down and weld a flange on it so you can bolt it down.
the only thing is that the MSD plug has 2 flanges at the bottom with 2 O-rings,has something to do with oil galley flow? good luck,mike.

 

I looked at those and they aren't available anymore......

 

I whip up one on the lathe, drill a hole in it and press it in with about .0005-.001 press... typically on the large cam bores it will need a chamfer on the bottom edge to conform to the tunnel. If I had extras I'd send one but I don't have any right now....

 

well there is something else you can build Chris and sell to the masses! why the hell would MSD stop selling something that everyone needs???

 

Some folks run a tube across the open hole... however I've not done that so I don't know the dimensions and process.

 

It has to connect the lifter oiling circuit...

 

On a Big M Dart, Lifters are fed from the front to back...... so a tall freeze plug would work......

I had to make a plug up for one I'm doing and didn't get a chance to tap the hole before lifter bushings were put in.......:-damnit
And the one I made is in the inside cause MR Marcella don't want me using a Stupid Long plug as he put it....LOL

 

Probably because folks like me were making our own instead of buying them from MSD LOL

 

Let me know if you're gonna make another on Chris. Deck height on new block will be 10.7" if that matters.

I have thought of just using my current distributor but I hate to kill a good part I can sell, but then again, it's no more money and I already have it...

 

MSD part# 8513 in stock at Summit or Holley/MSD directly. $168.95

 

I think he just needs a plug, not the one with the drive gear.

 

There will be a big leak if you don't put something down where the distributor goes thru the block at the oil galley, right?

 

I asked this question about a Little M once and got no replys. If the lifters are fed from the front and the distributor hole is the last place for oil to go in that lifter galley, can a solid plug be used or does the oil still need to go past the distributor hole? Sorry if I'm 'jackin' a thread here.

 

No, it can be a solid plug if fed from the front which Little M's are....

Where would it need to go.... to the plug in the back??...LOL

 

Unless you're trying to completely isolate the lifter valley, why plug it at all on a Dart block? Plug the intake and be done with it. If some oil returns down the dist hole it's really not going to get on anything to cause extra windage or drag.

 

I wonder if anyone has tried this. It would be a good place for oil to drainback if it didn't cause any other issues.

 

Got it handled, a buddy of mine here to run the nationals is going to whip me up one on his lathe...I'm taking a distributor to him to model after.....

Scott, won't it cause a complete loss of oil pressure to leave the distributor hole open? I know the lifters are fed from the front, but I'd think that would create a huge leak path if it's not.....Won't be running a dart block though, getting a Brodix.

 

On a GM block yes, on a Dart block, no.

 

Not sure how you can get a tap into that galley being the hole is 1/4 npt already on the other side of the distributor hole... you would need to get the tap all the way across the hole and into the front side to put a plug in it...

 

The Boss on the back of the Block I have has enough material around it,I was going to open it up to a 3/8 NPT size, then tap the inner hole to 1/4 NPT.

that was my thought anyway...

 

Would a galley plug with a long tip on it that goes thru the distributor hole work?

 

Yeah, I think you're on to something. Like a "dumbbell" on the front of an LS block.

 

Any idea if the merlin block is fed from the front like the dart?

 

Not sure on the newer ones, but the last one I had was fed from the rear of the block