Richmond 4+1 Amateur Install

[SCOTI]

The original trans crossmember/mount was intended for the lighter/smaller 3spds w/bellhousing of the time. The larger heavier 4spd's (& now 5 or 6spds) & auto transmissions would utilize a more traditional crossmember @ the rear of the transmission like you installed.

With the new x-member in place, the original one isn't needed & can be cut out/discarded to make future service work easier.

You can also make a patch piece for the original hole in the floor so that it covers the original hole w/about a 1" flange all around. Then open up a new smaller hole that works for the new set-up. That will help seal the floor up a little better. Fumes, noise, & external weather have a way of slipping past that style rubber boot when they barely cover the floor opening.