The Wiseco pistons are in production, although not completed yet. I had to jump through all sorts of hoops to get them done, even as far as speaking to the machine programmer and sweet talking him to convince the big cheese that the programming is not a big issue.

These new Wiseco's are basically the same spec as previous but with a coated skirt.

The Wossner's are in process. After some mailing back and worth we've agreed on the design and they're hopefully getting the forgings sorted out. When they're done and tested we'll possibly stop the Wiseco's or offer a choice. We'll see. They'll be twin ring, just like the cast and Wisceco's and will be coated on the skirt.

Once we've got this all sorted I'll probably stop the cast pistons. They're not the best, so I'd rather not sell them. They're just the best of the OEM pistons I could find that worked for the 300.

The bridge cooling holes are now reduced in size. One reason is that I found that the smaller holes work just as well. There's less chance of piston fatigue too.

The Wiseco's are not supplied with the holes drilled (they don't do that for some reason), but I will drill them as matter of course.

The Wossner's will also be drilled.

If you need full length skirts just do as Hermit says and make a note in the comments on the order.

Concerning the case mods required. It just a bit of grinding, well within most people's capabilities. You could use a half round file if you could be bothered.

The pictures I have are not exactly pretty but they do show you where needs to be cut. Mail me directly if you want the pics.