NEED HELP pls

[shifty]

Hey y'all, i ran into a snafu and need some help.

got my cab off today and i ran into a snag. I'm using an aftermarket ECE crossmember for my LS1/T56 swap b/c the stock one won't work as well.

the bolt holes for the xmemeber line up perfectly with the stock holes EXCEPT the xmember is ½" too far forward when i use the stock holes. i need some advice. here are some pics, i will post questions after. please help if you can.

PIC #1 - stock holes in framerail:



PIC #2 - the holes i need to have in framerail to use xmember:



i need to know:

1) Is using two oval holes for the mount a bad idea (slippage, etc)?

2) How would I *properly* turn that round hole into a pill-shaped hole like in the second picture? A drill obviously will not work here. I need to know what tool to use and what attachment/bit/whatever and any tips on how to keep the hole straight to look like the stock one.

i'm really looking forward to advice. thanks to anyone who can chip in. if anyone is here in the GA area and has any experience with this, i'll trade what few parts i got or kick you a 12-pack or something for your help.