Junkyard 5.9L Magnum + Edelbrock LA heads build

rumblefish360 said
Have you seen this done before?

I haven't seen it but it's been mentioned in past threads. I know it's not OEM reliable but I think if I use proper high-quality fittings and tubing it'll work. Careful planning and routing too.

FWIW I'd rather have an external oil supply outside of the engine as opposed to through the valley, if anything leaks i'll be able to see it instantly...

nm9stheham said
Seems like a decent solution.... out of the way. Where do you plan to put the restrictions? You're gonna have full pressure so I would think restrictors smaller than those used in an LA blcok would be needed.

If you look at the rocker shafts you will see the 2nd and 4th rocker shaft bolt holes are larger on the lower side of the shaft to accomodate the oil flow up from the stand. So you may need to enlarge that back hole.

I looked closely at the holes on the rocker shafts, they all seem to be the same oversize. I bet it was easier for manufacturing just to drill them all the same diameter. Besides the oil will be traveling up through the bolt basically.

For oil restriction it'll be a bit of a trial-and-error deal, I think i'll try an orifice at the block outlet. For testing I got the idea to saw the tops off some stock LA valve covers and run the oil pump with a drill while turning the engine by hand, that way I can test it on the stand before it goes in the car and gets fired up.

I'll be going to a local plumbing supply shop and see what advice they might also have, it's basically a hydraulic system.