For your Application I would go with a After market case, 300M input shaft, sonnax high drum kit, carbon band, Dual ring servo, (I prefer the TSI style with the lip seal on the apply side), !.80 planetary. A roller bearing extension housing is not a necessity, but I run them on both my cars. The aluminum drum is a big expense and has a short life span, if your really wanting to lose the 4ish lbs of weight, the Coan hybrid drum is the best to use as it is almost as light as an aluminum drum, but with it's steel band area it's durable.
Dan