'86-'13 swap questions

[rodstored-72]

Originally Posted by Wgesnerjr

I used the factory Underhood box and although it a great learning experience and much cheaper, I would not do it again. As said before, it's bulky and not much is used on it. I thought about using it for headlights, fog lights, a/c compressor, horn, etc. But wound up only running fuel pump, ecm, and starter through it. Not alot of wiring break down on it and a lot of hunting for which wires go to which fuse.

To save time AND money, go with recommendations on LT1swap site for using the original harness and stand alone fuse/relays. I would do it that way if I could go back.

Wgesner,
Thank you for the reply. I agree that maybe knowing now... I might have (still might?) just used a psi harness but...… would you share on how you "attached" the wires to the underhood fuse box? as indicated I have the diagrams for the box, connector and all the pin numbers. I don't know how to connect the truck wires to the fuse box? do the wires get connected directly to the fuse/relay "tabs" from the bottom of the fuse box? example would be connect the starter truck wire to the underhood fuse box starter relay or fuse? and doing this by "connecting" the wire directly to the corresponding fuse/relay tabs from under the fuse box? or do I "splice" the wire to the corresponding wire before the connector into the fuse box?

thank you again for time & response....