Re: my first boat 1962 mfg
Sorry for the bad news, but it is what it is...
As far as making a hole and trying to dig it out...it is possible, but I am not familiar enough with the construction of this boat to know for sure if you will be able to reach all of the foam from one access opening...
Maybe one of the the other guys, who are more familiar with this design will chime in...
As far as replacing it, I personally would recommend very highly that you do replace it as it is used as a safety feature in the event the boat ever gets swamped and it may also be structural to this design...
You would need to find out the density of the foam originally used...it could be 2 pound, 4 pound or even 8 or 16 pound foam, I am not sure...
It is available from several sources, one of the best known ones is US Composites, but I think Iboats may carry it as well...