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Ok, this got real ugly. IBT quoted it at $991.94 with a 5 week delivery plus transit time. It looks like it may be a special. These are the prices I got, as are the ones mentioned before. (I wasn't planning any markup, this is hobby not business).I have looked at the book some more, and I don't think that they are curved axially. I think the spider may be slightly, which would allow for angular misalignment with less pressure, but from their drawings I think the jaws are straight axially. I like the CJSPC which uses 2 spiders, but would only take about 1" extra space, and would allow for much greater axial misalignment WHEN the frame flexes.Seriously, I could help you make these over the holidays. Give me some dimensions. Do You have your busa motor? I assume you were going to bolt one flange to the busa output sprocket. If the ID of the spider is larger than the od of the busa output nut, we could make the flange very narrow, and make a counterbore that the sprocket could fit in, and be welded around the od. Of course you would want to turn the teeth off of the sprocket. What is the limiting od? What is the od of the sprocket at the minor diameter of the teeth? You might as well use the biggest OD Spider possible. If the ID of that spider is big enough to clear the OD of the shaft nut then you will be able to greatly reduce the overhung load on the output shaft.Now that you have the tranny with bellhousing removed, how close will it fit to the motor? Is the coupler going to be the limiting factor, or is the stator cover going to hold the tranny away? Are you going to shorten the input shaft on the tranny? How big is it and how did you plan to attach to it? Do you have the VW dimensions (bolt pattern, dowels,and bearing location) for the new cover that will replace the bellhousing or are you just going to use the bellhousing for a template? I could help you out with that if you have dimensions. I also have some surplus 5/8" aluminum. What are the dimensions of the front of the tranny? Does the input shaft pull out once the bellhousing is removed? Does the cover control thrust? If this coupler design works, I will be interested in doing the same thing when I build a buggy, so I have a vested interest. I attached a pdf of the motor side coupler I was describing. The 28 size you were looking at is 2.56" od x 1.18" id. I doubt the 1.18" ID will clear the nut. I don't have a busa to measure from but the bigger the better on the spider size. Once the max OD is determined a spider could be chosen etc.Let me know if your interested. Give me some dimensions and I will draw it up. My CNC is already plugged in and this would be a piece of cake.