motor mounts--i got mine from dan at vetteworks cheapest ones available and nice product
wiring/pcm.-- i used 99 fbody harness ,wired up a couple grounds and a few hot wires and thats it.saved on a $500 harness
pcm--- i got from jesse at wait4meperformance,he set it up and provided the pcm for $150,fired up first try-now use efilive
transmission---700r4 had pcm programmed for 6 speed and made my own bracket to attach tv cable to throttle body
also used a crank adapter and 6 longer bolts for the flexplate(from the dealer also) to mount to my 700r4 convertor plus used a c5 flexplate and removed the splined adapter from it,so this way both bolt patterns are on it,one for 700/200 and older turbo 350/400's.
exhaust-hooker small block sidepipes,cut off flanges and reshaped and welded onto new ls1 flanges from the dealer.# 12480130 installed 2 02 sensors into sidepipes tubes heated.
fuel pump---first try used walbro 255 intank pump no baffles,ran it dry and burnt pump up,switched to frame mount(Holly) with 99 corvette fuel filter/regulator setup.
accessories---using all fbody brackets and such,no a/c as of yet