I drilled out the exsisting holes in the fuel rails using a 3/8 drill bit about half way through the fuel rails stopping a number of times to make sure i wasn't going to deep.i tapped the exsisting hole on the intake using a 1/4-20 bottoming tap.i'm using 1/4-20 x 1" cap socket head stainless steel screws.
what do you think?

 

Another picture

 

looks good wish i had enough motivation to do that to mine