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My rear drive starter

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I knew there had to be a way to do it, so here is my first attempt:

The new ring gear has to be bolted to the harmonic balancer. Since this would be the reference surface for everything to follow, it is very important to ensure that this face is perpendicular to the crank axis.

This is a junk balancer: Not good enough to use in real life, but an excellent candidate for prototype work.

Here I have pressed the balancer on a tapered arbor, and am preparing to true the face.

Here the face has been trued.

Here the balancer has been drilled and tapped to provide 4 mount holes for the flywheel adapter.

Here is the beginning of the flywheel adapter. It has been bored to the same ID as the balancer, and pressed onto the same arbor.

Here is the finished (almost) product. Drilled, tapped, counterbored.

Back view.

Mounted to the balancer. Grade 8 hex bolts.

Ugly flywheel. 10" diameter. The mount holes were in the wrong spot, so I welded them up and drilled new ones.

Sitting on the adapter.

Bolted to the adapter, with the 1/4" aluminum reinforcing plate.

'Nother view. Shows where the starter will mount. The mount face of the starter has already been modified.

This is the base plate that the starter will mount to. There will be 2 AN-8 nipples tapped into the plate for the oil filter pressure and return lines.

Here's the bracket that the starter will bolt to. The 4 -4 bolts will be safety wired.

Same thing, opposite view.

Starter mounted. Still have to make a rear support, which will have to wait till the engine top cover is finished.

Ring gear mounted.

This is the area that will get tapped with 2 AN-8 nipples. I plan to hollow out the underside similar to the stock adapter, to allow for the pressure relief valve to remain operational.

Updated 25 mar 2K

I decided that driving the alternator from the harmonic balancer wasn't gonna work, so I needed a new pulley. 3/4" 6061-T6 plate was the raw stock.

Here is the almost finished product.

This is the back side... I later machined a relief for the flywheel adapter to sit in.

Mounted.

I wanted to keep it as close as possible to the ring gear.

2nd generation starter base plate / alternator mount. The oil filter holes / reliefs still have to be machined; this thing might change again, so I don't want to waste any effort! The lower bracket on the alternator will also be replaced with a shorter one.