Not Ranked
And thats why you should use a min of 1/4 blockplate that is also the rear mount for the engine--the frame mounts will keep it in place--
Go read up on all the rules and allowed requirements, mods that are allowed or required by the racing associations and you will find that it is much more complex than just using it for a bell housing--
When a clutch / flywheel lets go, there will be a sudden release of the force that is counteracting the engine torque and the then opposite movement will more than likely spit out all the bellhousing mounting bolts into the block and nothing in the housing will prevent it or cause it---you know the old equal and opposite thingie????
In NHRA you must have blowback structs mounted from the housing to the frame to keep the assy in place--anymods done to a housing then is required to be sent back to the manufacture for approval the same as for getting the date updated
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