Average cylinder boring/porting pricing?

MMor101

Very nice, How much?
Location
Skippack, PA
I have a Group K big bore motor which recently cracked the cylinder. I have a new stock 61x sleeveless cylinder and the big bore sleeves out. What would it cost to get the stock cylinder bored and ported to match the big bore sleeves? Would it be necessary to go back to Group K? Could I just go to a local machine shop and have them do it or is the porting a big job? I'm on a tight budget.
 
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