Modify and measure. The Idea is too important to ignore....machine shop nation wide will get there becoming forchargeig so much and taking to longto complete our needs.
I know a machinist from my old job who was brilliant. He once showed me pictures of a homemade boring bar setup he used to cut the ID of a cutlass bearing on a big ship.
I mean he fabricated the entire tool to cut the ID of the ship bearing
If your asking could a drill press be used to fabricate a boring bar for an engine cylinder, id say anything is possible but it would not be practical or economical, to mention nothing of being confident the bore would be properly machined