the manifold panky , i put the front wheels up un ramps dropped the front pipe and pushed it to the side drilled the old studs out with a 10mm bit then tapped a 12mm thread into the whole and used 12mm threaded bar for new studs, it went well but i had put the tap into a socket and use an extension and ratchet to get below the sump and have room to turn the threads in , and then i had to open out the wholes on the exhaust flange a bit to get it over the new bigger studs , i didnt use the new sealing ring the old one was slightly bigger and seemed to do better job when tightened up . ime not sure i would recommend this approach but it worked for an old joiner and took about an hour
Mand N Mark