opening where the starter is mounted camaro 67

[overthetop]

Hello guys. I am new at this forum and new to this kind of "hobby" i bought myself a 67 camaro late last year. Have some minor issues here and there. But today i had a look under the engine to find an oil leak , when i saw that where the starter is installed there is a big gap on to the bellhouse. Im quite sure that this shouldent be like this. But what should i do to cover up this hole again ?

Ill see if i can get a picture tomorrow