You can also use these. Mounts the same.
You just ground out the extra spark plug lead.
Link- https://www.ebay.com/itm/133756685510?hash=item1f24850cc6:g:zeEAAOSw3Sla4MKI
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.