Suby pan shortening

[Hoghead]

I need to shorten the pan and pickup on a Suby engine and I cannot find the offer to send me a drawing on how to do this using side "wings" to maintain the volume. Rather than reinvent the wheel, it would be nice to build on past experience.

yes I know I can buy one, but I am in Thailand and the cost will double by the time it is landed so I need to do it myself.

Robert