rb20det silvertop wont start

[jaquies]

help! problem driving me nuts!

i picked up an rb20det silver top from a friend. he had it wired for and running just fine in an 89 sohc 240sx. i put it in my 92 dohc 240sx with same wiring and it wont start!

yester day it started and ran for about 6 seconds then cut off. i guess i need the sohc engine room harnus for it to run corectly but they are hard to find.

what are the simplest options i have to fixing my problem?