Hii have a couple of questions about your SVE 87-93 FORD MUSTANG SVE 5.0L TOP END ENGINE KIT . My main concern is about the cylinder heads. It says they have 2.02 intake valves, so how are they designing the head to work with a factory piston? Are they like the trickflow twisted wedges? Also what valve springs come with these heads and with lift are they good too? Is there anyone i can contact about these heads?