When I had a new 350 crate motor put into my 75 Camaro my mechanic said my old, original 32 year old distributor looked fine so he reinstalled it. This is the original coil and module that had 200,000 miles on it. Motor runs great but I wonder if I should replace the coil and/or module for better performance. Don't coils either work or don't work? Would I notice a difference with a brand new coil? Any recommendations over stock GM coil/module? Thanks.

... Motor runs great ...

If it ain't broke...

I'd leave it as-is.

Why fix if it aint broke? DRIVE IT! LOL

On the other hand, you can always fix it until it does break...........

Distributors will get side to side slop in the shaft as the bushings wear. Also the mechanical weights have bushings on them that will wear down and allow the distributor to advance too far. If you aren't experiencing these problems I wouldn't worry about the distributor.

The old epoxy filled HEI ignition coils do age over time. The epoxy will allow them to over heat since it doesn't conduct heat well. But there again if you aren't experiencing any misfire, coil arcing or other problems you think may be related to the coil, I wouldn't worry.

Best thing you can do is make sure you have a good cap and rotor, plug wires and plugs. The ignition system should be in good shape once those things are in order.

You could always buy the upgraded things and keep them in the trunk and if anything ever goes bad you will have it with you where ever you go. Just a thought. :)

Best thing you can do is make sure you have a good cap and rotor, plug wires and plugs. The ignition system should be in good shape once those things are in order.

Thanks...Yes, the cap, rotor, and wires are new. My original thought was ...you know how nice it feels when you put in a new cap and rotor and you get that nice, crisp, throttle response....I thought maybe if I put in a new coil I would also feel the difference....but hey, the consensus is to leave it alone till it breaks, which is what I'm going to do. I've also heard the new Delco coils and modules are not as good as the old ones when they were made in the USA.

On the other hand, you can always fix it until it does break...........

That's hilarious but true, been there done that. 75Cam, I just finished replacing the original points type distributor, coil and spark plug wires on my 69 350 Camaro. I put a Mallory Unilite distributor, Mallory coil and Acell 8MM spiral core spark plug wires in the car. Set the timing and it made quite a bit of difference in how smoothly the car runs, better idle, crisper throttle response and better warm starts.