Testing ignition wires

[turbo ride]

I had an ignition issue back in September - just in time for the Rennsport roadtrip. Long story but cut to the chase I replaced the cap, rotor, plugs and wires. The wires were for sure part of the problem. Was it one wire? Every wire? Just the plug connectors? That I do not know - YET.
I have Clewett wires on the car now.
I have the old Beru set. I have replaced 3 or 4 of the plug connectors since putting that wire set on 5 years ago.
My ignition issue seemed to involve heat - as the car would run fine for a bit before hesitating. I think the heat would build up (increasing resistance?) and cause the problem.
I'm sure most people would just toss the whole thing in the trash. But _I_ would prefer to keep a few good wires and/or connectors as spares - for roadtrips etc.

So. How do you (can you?) test these (resistance I assume) knowing/thinking failure requires heat?
Do you put them in the oven at 200 degrees (or some temp low enough to not melt anything but high enough to cause an issue??) for a bit then test??
Is there anything different about testing the plug connectors (compared to testing wires)?

Thoughts?

Thanks-