I installed a G.V. unit in a 67 B body about 5 years ago and all that was needed was a slight amount of about the size of a Quarter.to the trans tunnel in one spot .....
The entire installation took about 6 hours including multiple beer breaks.
If anyone considers that fabrication they probably spend to much time fabricating Doobies !


As far as a reduction of 700 rpm being useless???


There,s pro,s and Con,s to everything & It,s nice to have choices . some engine/gear combos might not need such a steep o.d. ratio .
If i had a small block like the o.p. i would have went with a 500/518 instead.