Bartamos, thanks for the advice. Does anyone know if an aftermarket transmission crossmember would allow the booster to be used with a manual transmission?
Depends:
Some report no conflict with the cross member.
Some report slight modifications required to stock member.
Many trucks no longer have the rear transmission cross member in place. Have been missing for years. There some debate on which models had the rear cross member. Several factory shop manuals make mention of the member with certain models.
The aftermarket universal cross member can be used if required. Small amount of fab work required.
There are several prior post on the rear cross member topic the above sums up the consensus.