The 700R4 shoudn't require any tunnel mods.
I know the 4L60E and 4L65E (electronic versions of the 700R4) requires a few dimples in the tunnel right where the bellhousing bolts to the trans case due to the constuction of the case, big bolt bosses in that area. I'll be bangin' on my '64 Tempest in that area soon, I'm putting a 4L65E in it.
The 700R4 doesn't have that feature, the main case is one piece.
Wheelspin (Les) here on PY has a 700R4 in his '66 GTO if I'm not mistaken, you could send him a PM and see if he had any issues.
|