Ive seen puropedo member advertise a lot of turnkey ready Ls engines for sale cheap on local Ca Craiglist (usual asking price is $1600) he claims you would get a complete Ls engine with accessories with a stock Gm re-wired harness for that price, I have a friend who got an Ls1 off a 2002 camaro and gave him a call to find out if he could do his harness/pcm re-flash and supposably he could do that for $450
.. IDk, dont mean to talk Sh** but he even shows a youtube video firing up an engine on his ad, I will try to find it and post it