[unruhjonny]

So I am slowly but surely continuing to sell off my now dwindling supply of spare/extra parts.

I have a spare 350 that I received a year or two ago as payment for storing a bunch of other parts for several years.
The main reason why I accepted it, was that it's a runner.
It was pulled from a 1977 Trans Am my brother bought - so I can attest to it having run.
Now lets take pause, I am not saying it was a strong runner, but simply that it ran.
It's a 1973 post-EGR revisions engine, that I received with a 1969 four barrel intake manifold. -that intake was the other reason why I accepted this engine.

I recently sold my spare 400, and as a result, I am shuffling things around and decided to clean up this 73-350 before putting it away again.
I noticed that some lifters were getting stuck in their bores, so I took the time to remove the rockers and pushrods one at a time, pull the lifter, and clean pushrod, lifter bore and the lifter of old gunky oil.
My other 350(a 77 with the light crank) was pulled and put aside after a rod bearing span, and I learned the hard way that you need to be on top of things, or like that engine, things can seem to seize on you.
During my cleaning of this 73-350 I noticed that one of the cam lobes is nearly flat - it does ever so slightly still open and close the valve, but not a whole lot.

It might be worth noting that this is the first engine I have ever seen to retain the original composite cam gear.

Here's my crazy idea that I'd appreciate an honest opinion on:

I have an "A" cam that I pulled from my 70-400 back in 1998;
I was wondering if it might be feasible to pull this worn '555' cam, and simply replace it with this "A" cam;
And to be clear, I am meaning to leave the original to this engine (now thoroughly hardened) lifters in their original bores.
I would pull the timing set, and replace with another better (but used) set, sufficiently lube everything, and button it back up.
My thoughts are that since the cam and lifters have both seen ample heat cycles, that nothing should be liable to failure due to lack of heat cycles.
(Or maybe I am totally off my rocker?)

I don't imagine that this will ever be any thing more than a spare motor, cleaned up, and in running condition.
I know that right now everything is matched up, and even though that one lobe is worn badly, it would (hopefully) run quietly should I need or want to put it into service. I am concerned that doing this might make it run less reliably, or exponentially noisier.

Am I chancing things going awry by leaving the lifters from this '555'(?) cam, and using them on an "A" cam?

I'd appreciate thoughts.