If you are worried about strength you could run two bars from box to block like ford used to do even with all the bolts in on the ford.

Yes I thought about that too. :) Thanks.

Here's mine. Welded up by kev. I supplied the pre-cut sump and the pre-cut 6mm ally plate and ally sump plug boss. It sits 25mm under the chassis and will possibly end up with a home made kevlar sump guard at some point. It has two bosses welded in, the top one for future turbo oil return if i go down that route. In hindsight, 6mm is too thick and 4mm would have sufficed and been easier to weld. oil pickup was also shortened to suit.

This is on my todo list as I have scraped a few of those narrow speed humps already.

Cheers
Stot