Is it possible to change what tile a vanilla item places?

[DualFighter1]

For the mod im working on i want to change what tile the vanilla iron ore places, is this possible, i do not want to have to code in an entire new item just for it.

The issue is for the mod i want to have iron ore require a certain pickaxe power, i cant find anything about changing vanilla block pickaxe power requirements so i assume i will have to make a duplicate block and replace all the iron ore on world gen, is it possible to make the vanilla iron ore item place this new iron ore block? is there a way to change vanilla pickaxe power requirements? some help would greatly be appreciated as the same change would need to be made for lead as well.

Thank you

 

[Michaelsoftman]

You should be able to make a GlobalTile class and change the MinPick property for Iron Ore.