the other valves were bent from another engine that grenaded. the heads and vavles have been checked,as well as the springs. the valves and springs were on a engine with .545 lift. he had .100 longer pushrods in it ,too. they're engine pro race valves,springs,retainers and locks. i was thinking on getting standard length valves to go with the same pushrods i have in my engine now. the cam i have is .525 lift with my 1.6 rockers. the only difference in these heads are the valve sizes on int. and ex. and are set up for screw in studs. both the current heads and these heads are vortecs, just different castings. figured being the machine work and the price of the springs alone would offset the cost of new valves anyway. just need to know if i should go ahead and get just 4 int and 4 ex valves the same size and get a set of longer push rods or try my standard length first to check the pattern of the rocker to valve tip.