Up until around 1964/65 Gibson used a 43 mm (or thereabouts) neck width at the nut.
They then slimmed the neck to around 41 mm at the nut: sometimes refered to as a pencil neck. This profile is less desirable than the wider neck profile, although obviously this is very much down to taste/ hand size.
From around 1969 it seems Gibson gradually went back to the wider neck profile, although this does seem a bit variable on guitars of that era.
Obviously neck profile is a matter of personal taste, I prefer the wider neck profile. Mind you Angus does alright with the pencil neck profile!
My general option on modify guitars (and indeed amps), is that you are often throwing good money after bad, and if a guitar amp etc doesn't suit you, you are often better chopping it in. I think most of us have bought a guitar without being 100% sure about say the neck profile - "I'll get use to it" - and regretted it later. I know I have.