yeah just change the nozzles from 03 to 04.5, the 03 nozzles wont work, the spray pattern is different. you would be spraying way outside the bowl. I have a 06 truck with 03 injectors and 04 pistons..lol
it will work it just won't run well........
I did 03-04 style pistons and injectors in the 05 puller in TX that's being built for my father to have some fun!
we left the 05 comp on it for now and it's running great, coated them and shaved them down, should work well.
I've got a pic of the pistons on my email
Mine Are Slightly Shaved And Coated As Well, I Did Mine This Way Because I Got The Injectors Cheap And The Pistons Dirt Cheap.. Also Wanted To See The Diff In The Pistons After About 5k Miles Compared To My 06 Pistons After 5k Miles.