Excuse me for the delay in replying.
This was driving my nuts, so i did prefer to take a break while i was receiving the parts i was waiting for.
Now i got the Stant 10071 cap and the AC delco CV736 pcv valve.The Stant cap comes with two grommets and one of them fits perfect with this valve.The bad point it doesnt seem to be a breather but just a cap for the pcv installation.
I also have installed the correct vacuum advance canister .
Its really important the timing curve doesn't start advancing to soon with that cam.
If its 20* at 1000 rpm, 17* at 900 rpm, then it could 16* at 800 and 15* at 700. That would be a reason why it won't run as well at 700 or 800 if for this particular engine combo it needs 17* at idle.
I suppouse this will be with the vacuum advance plugged in?
Connecting to manifold vac.i,m around 36* at idle.Also helps to increase the rpm a bit.
Another thing to consider about timming is how many volts does need a MP ignition system to produce a healthy spark for a good combustion.
The stock alternator with the mechanical stock regulator starts charging over the 800 rpm and i would say that it does not arrive to 14 volts.
