I had one of the first batch of the Worlds car that still had some white nylon parts, later cars were all black. I recently got back into RC and pictured in my head that my Worlds car was still sitting in the garage back at my parents home....no such luck, all I found is a box of parts with lots missing including the milled chassis.
I have started collecting parts to build a running version around another gold pan chassis that I have but like you I so wish I had not torn my worlds car apart....probaly made sense at the time when I was 14 and all I wanted was a B2!!
Check out RC10talk.com for some really cool old RC10 stuff