Well, I think the Audi V10 would fit as it is a compact engine. Probably similar in length as an LS. I don't know any V12 that would fit without a good stretch ;-)
Anyway, back to business. Tomorrow is crunch time for my 986. I took it off the road for a year, but that is due to expire next Tuesday. So I better get an inspection now instead of renewing the off-road status.
So after the catalytic converter arriving last week it is now mounted and a bracket was made this weekend to secure it to the gearbox. All solid now. Then I bolted the rear braces back. This morning I was able to start the car

It sat for a year and a half and so much was done that it was actually an exiting moment. Just a few turns and it sprung to life. Little lifter noise, but that was about it. Then I was even able to move it forward and backward a bit on its own power (which was another great deal as I mounted this unknown condition G87 box and had some difficulties in bleeding the clutch slave.).
This afternoon I did a coarse alignment of the rear suspension, such that I can at least drive it safely to the test center. Rear bumper mounted back up, engine cover closed and quite a number of small things that needed to be done still. Then this evening I took it for a drive (sorry mr. policeman). All gears functional

. So far, all systems green. It did smell rather strong after the drive, likely due to burning of grease and sticker stuff from the exhaust. I guess that should become better in a few drives. Alignment is off a bit, but it isn't scary to drive.
So tomorrow it will be tested. Fingers crossed it passes and I can solve minor things at my own convenience and actually start to enjoy the car for the first time