mid-swap; wiring question

[jrsink]

Is it nessesary to remove the dash to access the complete wiring harness and/or ECU for an S13 SR20DET swap? Or is it just a matter of knowing where to cut the stock 240 harness to begin splicing the silvia harness?Please let me know what you think the best method here is. I do have a front clip so I go the complete silvia harness and ECU currently attached to the clip.

[slow s13]

You unbolt the ecu connector from the ecu, then thred it through the firewall out the engine side, there is a plastic holder up behind the hvac fan. I just pull till that little bastard breaks it doesnt take to much, when you get in there youl see what I mean. But no you dont have to take the dash out unless your hell bent on takeing it out because I dont think you can get to that plastic retainer untill the dash is out. Ive got harnesses out of two cars no problem.