I've got twin 502's. They seem to be in excellent condition. If, at some point in the future, I decide to do a routine overhaul, how much should I expect to pay?

Doc

I did my own re-build last season with Crazyhorse's help (o.k. he did most of the hard work!) and got out of it for about $2000 or so total, parts and cheap labor (bring him a diet coke and some orange slices and he's good to go).

To pay labor to have it done will cost more of course.

I did top to bottom. Valve job, valve grind, new pistons, bored all 8 holes, ground the crank, new bearings, etc...

if you have a pro do it will cost about $5500.00 ea provided it did'nt blow up and all parts are good (pistons will probably be new).