I'm in the beginning stages of a car project, and i'm doubting, should i keep the insufition factory petrol engine, or do a diesel swap, the only complication is there are no factory bolt on gearboxes for those engines, so people are making adapters to fit them but also a flywheel spacer is needed, and i've never had to make one before, so i wanted to ask has anyone made one, what to look for , what material to make it from, also can i make strong enough bolts, because factory one are way too short, this is a picture i found of someone had made exacly for aplication like i need.