Neither option will work "bolt-on" for Dave. He has a mid-engine Spyder, sled tins get reversed.
And the J-tubes on almost all Spyder exhausts go under the middle of the pushrod tubes, but above the sump bottom. Would be quite a pain to make the tin around the exhaust. A hole needs to be cut, and some other way of attaching the outside "valve cover" edge needs to be fabricated: no heat exchangers to bolt to.
A nice right angle would make the tin strong enough to support itself. I have bolt on valve covers, so I used the bail holes and bails to support the outside edge and keep the tin sealed against the head.
I have pics on an old hard drive.