Tremec

Who makes an adapter for sbm? Do I understand correctly that the tunnel needs to be enlarged for the 5 and 6 speeds? Thanks.
I bought a kit from silver sport transmissions with a TKO 5 speed. Kit had everything needed to convert to 5 speed from automatic.
this pic shows how far into the tunnel it went, I still had to build brace over trans, and tunnel cover.tremec.jpeg
I did a 5.7L hemi swap and used Gerst IFS.