[homemade87]

I see you put a cam in . If you did not take the time to check preload on the lifters with the correct push rods length its very possible you will get some noise . Not sure how bad yours is but most ls motor will have a little lifter noise with a cam swap . Mostly with the bigger lift . Dont know how small your lift is and may not be that significant on your engine .

Also most aftermarket cams have a different base circle and will require different push rods . I would check with your cam supplier and see what is required .



This may be one other clue ( when the engine warms up ) . Could be an exhaust manifold leak . Some will not leak until warmed up . Sounds like a lifter tick .

Just a couple thinks to think about .