Where to modify {invoice_block_html} and {delivery_block_html}

[DRMasterChief]

Hello, i am looking to change {invoice_block_html} and maybe also {delivery_block_html}  - but i cant find anything about this.

It seems that both were created in a payment-module, but this describes only firstname and lastname.
Where come the other data like street, zip and city from in these blocks and where can i fetch them to add the customers E-mail-address ?

thank you