Alright, I have a rebuilt 460 in my 19 foot Hallett. The first 20 hours or so were fine, strong as hell and only with a 650 edelbrock, no sounds no problems, one day, out of nowhere it develops a ticking sound, very prominent, and the oil press drops significantly, now I know it is an oiling problem, but what could it be, I droped a piece of silicon in it a few months ago, but no problems developed for about a month after, I figure it would have been chewed up in the oil pump and deposited in the filter, other than that, I have no f-ing clue what could cause this problem, it is random as well, it will stop when I let it sit for a few and start again, it also looses power when about 3500 rpm's, and above 4grand, it will drop to 3 grand, it is just all messed up !! please help