Big Block Bellhousing swaps

HemiSSDart said

No that bell will not work, you need the correct 372 or 370 with the spacer and the bracket with the ball stud. If other bellhousings would have worked do you think they wouldn't have used them from the factory? People have tried to use the 513 before and found out the hard way...

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How about an explanation why and this 513 bell wasn’t made when the factory was installing big blocks in a bodies so naturally they wouldn’t be able to use it.
Just change the front bearing retainer to the 4.80 and it will work as intended I have one in a 67’ barracuda so I know it works.