I just got an STS .28 for mine. I was very impressed with the build quality.

Still haven't run it in yet as I am still trying to figure out what to do with my electronics and fuel tank.

All I needed for installing it was a "custom" (sounds better than hommade) header, some CT5 engine mounts, Big block pipe, flywheel, linkage, and then it's just deciding how you want the electronics and fuel tank laid out.