you're listing the friction surface diameter... thats irrelevant for my application as i'm using a 7.25" triple plate... not a large single disc clutch. So I can use an na bellhousing without moving the starter? the reason I ask is i am not using a z32 transmission but a t-5 tremec dog box, I just need the z32 bellhousing for its obvious use. We modify the automatic bellhousings at the transmission end to simply bolt up a t5.