This dang ticking noise started about a month ago real quiet and has steadily gotten louder and now I can hear it over the no cats, little flowmasters, dual exhaust(loud). First thing I did was listen to the top end(just put new cam and lifters in about 5-6 months ago) but the origin was lower and farther back. Started looking for some holes in the exhaust but found nothing. Now as I hang from the frame like a monkey(ground is about 3 inches of mud and water ) the noise seems to be eminating from the clutch area between the exhaust pipes. Is this possible? Whats going on? The throwout has been squealing occasionally and sometimes(pretty rarely) the clutch will slip and burn at a ridiculous rate(not lately). I have never even seen whats inside the bellhousing so I am kind of hoping the problem is located there giving me a reason/chance to see whats what. First off I was planning to adjust valves and get a better listen to the top end to reassure myself that is not where the problem resides. Any ideas or suggestions would be great as I am most definately a noob . Oh it is a 79 K5 3/4ton carbed 350,465,205.