Art, I may have a few details wrong, so don't quote this as gospel. It should get you started though.
Originally posted by art:
is there any difference between the cream injectors fitted to the 170hp v6 and the yellow ones fitted to a 99 svt v6
The 170hp injectors are rated at 17lb/hr. The SVT injectors are 19lb/hr.
Originally posted by art:
also is there any adavantage in using the SVT maf when fitting the svt UIM,LIM, TB to the 170hp v6
I think you'll have to use the SVT MAF in order to use the SVT injectors. Your MAF isn't calibrated for larger injectors. If you're going SVT UIM, LIM, TB...you might as well go the whole nine yards!
Hope that helps. Anyone, please correct me if I'm wrong on that MAF/Injector relationship. 
