I think this is it, page 3 halfway down,
In 1997 I had completed and was campaigning the LT1/T56 powered 240z http://forums.hybridz.org/index.php?/topic/52346-lt1t56-240z/
Bob Maggio had completed the same swap in a 280z roughly six months prior but, as far as anyone knows, it had never been done in a 240. There was no documentation and no HBZ.
I was having problems tearing the diff mount. I don't recall how many mounts I tore or how many band-aids I applied. What I remember is, Friday afternoon, 'busting another'... with a race scheduled for Saturday. At the time, I was much more fanatical, and this was an EMERGENCY dammit! All I had on hand was some scrap aluminum, a MIG machine, and a local, cheap auto parts house. In desperation I built the ugliest diff mount in history. If you've ever welded aluminum with a MIG machine, you'll likely empathize with that sort of 'fun'. I was gun shy and concerned about tearing the isolators again. The long nose R200 has four holes right? Why not *TWO* turbo 350 mounts? So there it was, in all it's funk... two trans. mounts, on top of the diff, mated to a soda can bridge, a few hours before flag down. It survived the race.
At the time, I was also struggling with driveline vibrations. This led to further experimenting. Pinion angles, lower contact areas, shaft material, and so on. In the end, I built a steel 'bridge' with a single, shim-able, GM mount. I was on mount number three or four by this time. It was simple and I was making progress.
I don't recall the specifics, but I remember a few of us talking long distance. JohnC, Rags, Ross Corrigan, Pete Paraska, Jim Biondo, BRAAP, etc. This was before HBZ's time. In fact, it was before Internet forums were generally in vogue. Pete and I began discussing this very topic, and I shared my 'experiment'. He asked me to replicate it for him. So, I made ONE more, expressed my desire to avoid production, and asked him to keep the cost to himself ($20.00!).
Pete kept his promise, and posted the mount and prints on his website.
Regarding the donation, my relationship with Roostmonkey is top secret
The few I built for myself are destroyed. Does this make Pete's a collector item?