vivenvex

Right now i have a busted Ls1 and a built 4l60e in my car.

Just bought a 0mi 99-00 style Lq4. I know they have fitment issues with a early lq4 to a late 4l60e...

I now have the option to get a built 4l80e that will bolt right into the lq4 however...

-Will it accept the current driveshaft i have going into my 10bolt?
-Will it fit under the car without too much hassle? do i have to fab anything?
-Will my LS1 harness work with the 4l80 or will i be screwed in that department?

Thanks!