Hull thickness

[Doug]

Having the boat lifted to install some new transducers. The fit for the depth is very tight.  Can anyone let me know roughly how thick the fiberglass is at the bottom of the hull just forward of the keel?
Need to know if I should do a rush order on a shorter transducer.

[SteveLyle]

Every time I drill a a hole in the hull, it's About 3/4", maybe a tad more.