Im rebuilding my bottom end and i got a set of E5s off of a 351w for free. They look almost new, springs and valves and everything look great, very clean inside and out. Still had spark plugs in them when i got it and they dont look used at all. The E7s that are currently on the motor have high miles on them. Im planning on a set of trickflows next winter but how do you think the E5s would do to run around on this spring/summer? Im planning on using them with a B303 cam and GT40 intake until next year.