so i have a 1989 lx 5.0 automatic vert

i recently (2weeks ago) put a built baulmen* aod in it i like it but gas is killing me so i want to go with the manual swap and use a t56 for the 6 speed option for better gas milage+ performance , im wondering if i can get a t56 and use the t5 front bellhousing. any insight would be appreciated. thanks