replacing vol pot on LP

it's probably a linear taper pot (x% of rotation puts the wiper <center terminal> at x% of total resistance). for volume controls, most prefer a audio (or "log") taper pot. that is usually indicated on the pot with the word "audio" or "A"

here's a link that discusses the difference between linear and audio (log) taper pots:

http://www.westlabs.com/Pots.HTML

You could just keep the pot that you put in the guitar already and add a taper resistor to get a log-like response from it.
http://www.geofex.com/Article_Folders/potsecrets/potscret.htm

You could just keep the pot that you put in the guitar already and add a taper resistor to get a log-like response from it.
http://www.geofex.com/Article_Folders/potsecrets/potscret.htm

'tis true, but a caution: to be effective, this will lower significantly the overall max impedance, which may lead to some of the dreaded "tone suckage" -- especially for high impedance pups such as humbuckers and overwound.

You could just keep the pot that you put in the guitar already and add a taper resistor to get a log-like response from it.
http://www.geofex.com/Article_Folders/potsecrets/potscret.htm

'tis true, but a caution: to be effective, this will lower significantly the overall max impedance, which may lead to some of the dreaded "tone suckage" -- especially for high impedance pups such as humbuckers and overwound.

That's true but if it's got "vintage" / PAF style pickups then dropping the effective resistance in the pot won't be that bad. Gibson used to use 300K pots in many of their vintage guitars. Also, if it's the bridge pickup some folks like to put 250K pots in there anyways to cut some of the brightness.

So, that being said, a possible choice is to aim for an effective 250K pot. That might work in this situation and still give a somewhat log response. That would mean using a 500K resistor as the taper resistor. Still might be better to replace the pot but that will depend on how easily the OP can get a log pot.