360 Advice Needed...

I recently fired up the 360 after it had been sitting for 3 1/2 years. It was primed first and then started. It fired right up, it cranked for maybe 3-4 seconds. Right away the lifters were ticking, pretty loud and never quit. It ran for a little less than 10 minutes. I bought the engine used out of a '70 challenger "Never heard the engine run". Previous to the engine sitting it ran ok but it was percieved that it always had a miss at idle.

It was recommeded to me to try running some "Seafoam" through the oil and fuel system to perhaps clean the inside and maybe free up the lifters. I pulled the valve covers, all the pushrods seem to have a little tension or pressure on them when I tried to spin them between my fingers. All of the rockers are moving as well.

The engine is a stock late '70s 360, stock compression and heads-valvetrain, Edelbrock performer intake and a 600 or 650 carb, hi-flow 340 exhaust manifold on the drivers side and a '92 dakota manifold on the passenger side "Basically a nice set of exhaust manifolds", to a 3inch tti X-pipe full exhaust kit. The rest of of the car is a 67 notchback, stock converter and 3.23 gears.

If the lifters don't quit ticking I was thinking of replacing the cam, lifters, springs and timing chain with summit racing products due to cost and I get a NHRA discount. I would like a setup that maybe has a little muscle car idle but at the same time doesn't create any maintenance issues like valve spring fatige.

So two questions:
1) any suggestions to relieve lifter ticking?
2) Looking at summit racing cam choices these looked good but which one?

http://www.summitracing.com/parts/SUM-K6900/ this has 112 lobe separation.
or
http://www.summitracing.com/parts/SUM-K50052/ this has 110 lobe separation.
or
http://www.summitracing.com/parts/SUM-K6901/ this has 114 lobe separation, creating the most cylinder pressure?


Thanks in Advance.