I installed this last night.
The correct hub adapter for the plate Shane made is made by Grant part # 4391.
The wheel sits flush with the factory column cover.
This means the distance between the driver & the steering wheel is very close to the factory setup. Not like I was seeing with the Momo adapter. I didn't know a steering wheel could make the car feel more sportier but it did. The wheel is just a tad smaller in diameter than the 1g. The wheel I bought doesn't have the horn button but I have another one on the way. The horn isn't hooked up but I haven't had a working horn for 2 years now. I hope to fix this when the other wheel arrives which should be today. I see Momo horn button on ebay for around $25. I contacted some of those sellers to get measurements but no reply back from any of them /ubbthreads/images/graemlins/banghead.gif So for those that want to do this, you can purchase the evo 8 wheel w/o the horn button (that's where ~80% of the cost is anyway), buy the ebay Momo horn button & the plate from Shane. We still have to figure out how to hook up the horn though.
EDIT: I never heard back from any of the ebay vendors on measurements for the momo horn button.
I used everything in the box except the following:
You also have to cut a 21/2 diameter circle on the back cover: