ok this may be a little newbie but im just new to jeep fuel injection, i just scored a 4.0 head and all the injection stuff. but the wires were cut to the harnes just before it went threw the fire wall can they be spliced or soldered back together or are they resistance sensative.

They can be spliced, are not imedance referenced, but it might be easier to get a junkyard harness.

These might help to read too.

4.0L head swap article
http://www.offroad-review.com/product_reviews/4.0L_Head/40Lhead.html

MPI kit article
http://www.offroad-review.com/product_reviews/MPI/Mopar.html

thanks for the help i didnt thing of a junkyard harness till today and ill read threw those links the help is greatly apriciated.