I think one of my Toyota buddies had or still has that bell housing to fit either the 18RG or the 4AGE onto the W58.
My problem is that i currently have an automatic and i want to convert my car to maual at the same time as my enigne swap. So it makes no difference to me if i'll have to use a whole different tranny. Also, i think the T50 might be better for the 4AGE because its got close ratio gears and the 4AGE sure does rev up quick too.