65 factory tunnel with LS3/4l80e?

[64509chvl]

Hey I’ve got the factory tunnel in my 65 & I’m curious if the LS3/4l80e fits without modifying the tunnel? I did a quick search & come accross a thread that says yes with certain cross members & motor mounts & some saying you need the high hump tunnel, but I’m pretty sure the high hump tunnel is only necessary with the 6l80? Thanks for any info! I have a Porter built front end coming with their front crossmember. Posted in the 60-66 section, but figured this is a better choice.