I know that this is not a /6 question..BUT I am trying to help a 340 buddy of mine!! And in the nature of GOOD mopar help I'm beckoning the call!!1972 Duster 340.. Upgraded cam..Airgap intake....Hooker Headers....3.55 Gears....Never quite ran right...Flashes of brilliancy....Ran reliably w recent supertune by John Haley Motorsports assistance......Out of nowhere a ticking"clicking"noise w oil light on{but seems to run better and stronger"" WTF?????

Put a real oil presure gauge on the thing!!!!!!!!!!! NOW. Oil is nothing to play with (ticking, Light) Go to walmart, local parts store, or get a set of gauges from summit racing(they have a nice set of 2 5/8 summit brand gauges for like $35us.

I'd check for bent pushrods and possibly a lifter popped out of the bore.

As stated above, get a gauge on it.

As far as performance, sounds kinda like you got too much cam for the rest of the setup. 4 speed or auto?

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do a post on moparts.com . many more v-8 guys there to help you. ron