question, porting through rear deck ok?

[darren700 10+ year member]

ok, i have a 1997 cavalier coupe. i want to put a dd 9515 or a audioque hd315 in. my plan so far is to build a baffle where the seat folds down, then build the back of the box and slide it in from the trunk and mount to the baffle. i was thinking that for the port i would port it through the back dash. my plan is to build a slot port and cut a hole in the top of the box then cut the according hole into the dash, then glue and bondo it all to seal it. my question is, is there any issues with porting it like this? is there any risk to my glass?

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