GT40P heads and 1.7 rockers ?

[Ninety5five0]

I already bougt some pushrods, they are stock length. I talked to a guy who has a 95 5.0 also, and used P heads, he said he used 1.7's and stock pushrods and it all works out for him. He also used his stock valve covers. The only difference is our cams, i think he used a e303 and i got a trickflow stage 1. I'm not too sure if that'll make a difference or not. Will it ?
He told me i can use 1.7's from a 94-95 cobra. True ?