IF your going to cut a hole use the accessory radio speaker housing as a template, it will give you a large hole that the speaker cone normally needs to recess into and will make a great junction point. Then mount the speaker housing and it will look 100% stock.

I have L & R tweeters in my housing.

https://www.classicparts.com/1955-59-Radio-Speaker-Cover-Chrome/productinfo/69-546/

Mike B smile
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Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
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Silver Spring, MD