I have a 5 speed 2jzge from out of a mk4, harness and ecu.

Along with pedals and drive shaft from another sc

I don't want my sc to be down long. Will the harness from the mk4 plug into the sc300?

1995 supra to my 1993 sc300 auto.

 

harness and driveshaft are not plug & play

 

whats different about the harness?

are the under the dash plugs at least the same?

 

that is the difference body plugs that are under the dash

 

there is a ton of info in your thread, my head is spinning trying to deciefer what is mk4 and sc3/sc4
https://www.clublexus.com/forums/bui...-toys-142.html

are the connectors phyically the same?

Just repin a wire on a few of them and use it?

 

This is the most updated non vvti 2jzgte wiring harness thread :

https://www.clublexus.com/forums/per...made-easy.html

Body Plug connectors between the SC and the MKIV are not the same . So it is not a matter of repinning . You would need the body plugs from the SC300 .