Find a returnless LIM. They are cheap and easy to come by.
For the UIM the only thing that will make that larger is sending it to Extruded Hone ($$$) You are much better off saving up and buying an 99-00 SVT/ST200 UIM.
I figure you are also doing head work too otherwise these mods will make your intakes larger then your stock head ports.
There was a big reason the SVT's had single or dual EH'd head inlet ports.
