Quote from: cudaragtop on May 02, 2024, 09:13:37 AMThe 90 is physically larger than the 70.Got it thanks. I hope it's not remarkably larger and fits into our current transmission tunnel. I know the rear mount is slightly misaligned compared to 8HP70 and that can be accomodated quite easily I believe.
I haven't seen a direct side by side comparison of dimensions but the 90 is slightly larger and longer with different rear mounting hole locations. Will require a different driveline than the 70 or modification.
Link to a 70 to 90 swap. Not an E-Body but some useful info.
https://www.ramforum.com/threads/8hp70-to-8hp90-swap-useful-info-for-the-next-guy.189355/