Two Questinons

Car RamRod said:
I know your all concentrating on the shutoff, but does anyone else think those heads are hurting him? The larger combustion chamber loses compression, and the ports and valves are much bigger than needed, so the a/f ratio loses its velocity. Plus, it all gets clogged back up if your still using origional 302 headers.
The CR could be affected depending on the vehicle the heads came from.

Where did the heads come from?

The air fuel ratio is controlled by the computer which monitors incoming air via the MAF and the O2 sensor.

There could be some loss of low end with larger valves (if the valves are larger), but there would most likely be a gain in the top end.

The biggest concern would be the affect on CR.
 
No codes came up when I checked for them. The cutt off switch in the trunk is fine, I checked it a few times just to make sure. Back to the heads...I don't know what car they came from, I bought the car as is. I have 1 5/8" shorty headers so there is no problem there. I don't think I have any problems on my exhaust side, though these heads might be hurting me with the stock intake and stock cam.