To shorten some 1/10 wishbones do what you do for the phat bodies chunk. They are b4 wishbones, and you simply chop the end off and drill a hole straight through each side. Dremel it down a bit, then put a part of the chopped off end back on for strength. You might need to fill it for a good fit, but its strong. Here are pics:
http://www.uk-microrc.co.uk/forum/in...howtopic=15269
By the way, good luck - it has made me want to do a micro b4.1 conversion!