i have a sr-redtop in an s14...i was told the s13 wiring harness will work on my s14 chassis.. i just gotta change a few wires.. is that true?

Eh...i guess youre asking if you can do some wiring from the engine harness to your cars harness, in which case yes. There should be some info on what goes where and to what floating around...Zilvia, maybe phase2, nicoclub, etc etc. The thing that annoyed me is its a lil more work to make it clean because rather than just doing a lot of wiring to a fuse box like on an s13, your wires lead thru the firewall as well...but its not too bad. Also, if you meant using an entire s13 harness and i misunderstood then ignore me lol, as im not 100% sure on that.

Yeah you can use it. Just search any 240 forum and find out what
connectors to splice in.