[COPO PETE]

Marlin, Don't even talk to me if your not running the stock over the counter camshaft! My theory is GM spent millions developing these motors and shafts to run with manifolds, and if you put on headers, they would respond well, but they work well with manifolds. I've had so many guys ask me what shaft I'm running and I tell them. Then were at the track and their car is not doing the number, only to find out they put a "little " bigger one in or the 30/30 shaft. Bigger is not always better! Don't dick with the center line and put some over lap in it as you will lose some very important compression. Shift at 6000 rpm, not 5900 and not 6100 rpm.
I've had good luck with Protronix. Get the old style, as new one has some problems still.
My Nova is stock and unrestored. As in original springs front and rear, with UAP NAPA 50/50 shocks on all corners. I do put two clamps on each side ahead of the spring, mostly to help not spit a driveshaft.
Exhaust is very important. 2 1/2 inch mandrel all the way. My Nova currently has kinky 2 1/4, which is costing me close to 2 tenths.
Put in new body mounts, poly urathane is best. I currently have the original cracked ones in it, gotta change it. Brand new rubber is good also and won't flex much.
Run as close to 11:1 as possible, JE pistons are much better than the TRW I have. Likely only about 10:1 if measured.
In your case, save your original M21 and put in a M20 if your gunna bang on it. That's good for 2 tenths.
If I take my own advice here, I'm sure on E70-14's I can get a 12.80 out of it, maybe even a 12.70. Time will tell. Now get to work!!! [img]/ubbthreads/images/icons/tongue.gif[/img]
Peter