Half-assed searched, and kind of confused.

I'm goign to be going with a 3L hybrid with SVT heads so I can use my existing LIM/UIM etc. Its been recommended that I put in 19# injectors.

SVT came with orange and green 19# injectors, did it also come with a bottom feed type? If I have to use top-fed, that means using a different return-style fuel rail. Will I have to change my injector wiring harness to use the other (probably early SVT) fuel rail? The early SVT's had a return-style rail right?

If I install the 19# injectors, can I get away with installing a SVT MAF and will it run ok? Or should I stick with my 17# injectors and stock MAF until just before I get the chip burned (like, through the break-in period of 1000 miles)?