4 x m10 bolt held my td5 engine fine and thats a fair bit heavier go for, tighten bolts minimise leverage over the threads. good fun car buy the way mate.
When I hear someone mention they have a rollover jig I get so jealous
One M10 8.8 is good for 3800 kg, (not shear load)
Core diameter 8.676mm yield stress 640 N/mm2
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Surely a bit more info is needed before we all say yes it'll be fine.
Are we talking about the bolts in shear? Or in tension? If they're in tension what are they screwed into and how deep?
If we're talking 4 bolts that are into some cast ally and they only have a couple of threads of engagement then it wouldn't really be safe, if they're into the bell housing and an engine mount and will be bolted up, yeah crack on.
Do you have to completely strip the car or do you just take the engine out and away you go?