[blykins]

I sell Quicktime and Lakewood bells both.

The Quicktimes weigh half the weight (which in case your case doesn't matter, but to a drag-racer it does) and are available in "stickered" and "non-stickered" versions.

Both versions are technically SFI rated and are technically scattershields. Both will withstand a flywheel explosion at 10000 rpm. However, the non-SFI bell doesn't have the flange around the bottom of the bellhousing, thus it doesn't have the SFI approval. Even without the flange, it would contain an explosion and it would save your legs/engine/transmission/etc.

Most Cobra owners buy the Lakewoods then trim the flanges off the bottoms for ground clearance anyway.

Yes, cast iron bellhousings are indeed thick, but they are brittle and would not take an impact without shattering.

You should always check alignment on ANY bellhousing...stock, Q/T, L/W, etc.