this posting caught my attention also, for a 951 drop in/conversion... (I have the parts !)
or
you can even just put a regular 787 and use a rfi pipe, and its not a hard conversion.... (at least by conversion standards, in other words, this is not a 1 weekend project, i'm guessing 40 hours + of work involved)(maybe less,i'm using this number for my project since it involves building a 951 from scratch.)
but... your fuel tank/baffle might not swap, look into that., you'll need the proper electronics (and maybe have to swap gauges ???) you'd also need a 155 pump and the correct driveline, all the misc can turn a cheap project into an expensive one.
but this definitely caught my eye... its the kind of project that I like, there is a nice upside to this project, but if you've never done a major conversion before, expect some setbacks, don't go in blind ! In a perfect world you'd find a GTXL that has a bad hull, and move all that stuff over instead, since with a 787 it will be seriously underpowered, it will look like a RX but It will ride like a GTI with low compression and a bad prop if you don't put a bigger engine in there.
We recently did a GTXL, the electronics were bad but the engine was perfect, so i stole the 951 motor (which we put in my buddies 95xp), and we put 787 electronics, 787 carb'd engine, RFI pipe, and it looked great and ran nice, but it was running in the 46mph range with absolutely no hole shot. (my wife thought it rode awesome (she likes slow ski's) i thought it was like riding an elephant)