first let me say a 248 gmc is not a 350 chevy where the motor parts are almost given away because of the number of sales of the parts. the 248 could cost as much as 3 to 4 times as much just in parts. now when it comes to machining it cost more because it takes a different setup then the chevy v8 and different cutters. if he has to buy anything special to machine your motor and a motor that he may never see again do you expect him to eat that cost?
as far as doing the hone it thing if you take it apart and don't want to fix it right. i would not touch that one on a bet. did it once the motor lasted 2 weeks. but it went around town i messed it up not that to owner was too cheap to have it done right.
