so i just bought this gtp, and its the first moded one ive had.. there is a fairly loud tick that sounds like its coming from the front head... its a 98 gtp, 05 block,top swaped, 98 heads (10k on the heads), s1x cam, ls7 valve springs, speed daddy's, 3.5, 180 tstat... it has the moded retainers...