Check out the rear exploded view of the Slash:
http://www.traxxas.com/PDF-Library/5805_rear.pdf
Here's the part number referenced for the rear arms:
http://www.hobbypeople.net/gallery/630234.asp
These are shorter than the electric Rustler arms.
And then the front exploded view:
http://www.traxxas.com/PDF-Library/5805_front.pdf
And the front arms:
http://www.hobbypeople.net/gallery/630831.asp
These are the electric Rustler front arms.
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz