Theres no shared parts.
The parts you'd need from a TRF416X would be the diff, spool, steering rack, TRF shocks and 4 complete corners of the car (hub, caster blocks, driveshafts, wishbones, hingepins, steering rack).
The buggy is longer and wider, so you could be able to carry over the bulkheads and motor mount/layshaft, but you'd need custom bottom deck, top decks, belts, suspension mounts and shock towers making up.
By the time you've found somewhere that could do that though, you could have bought 2 TRF416X kits.
Quote, Leodis, 2007: ''I've been shopping online for 9 years and the only charge I've ever had to dispute with my credit card company was from TiR. Congratulations TiR. Even porn sites are more ethical than your company!''
RC cars - I haz sum.