As stated, this was the FIRST time out with the new engine. What we did try at the track was:
Swaped carbs with my tried and tested 930 Proform."I ran 11.8 with this carb".He gained about .040 and about 1/2 MPH. So we put his Demon back on. We changed plugs to a hotter plug. Picked up a little, but nothing to write home about. Increased timing from 33 to 38*. Picked up .050 to the 12.48 where we are at now with closed exhaust.
Headers are 1 7/8".
Uncorked the headers just for sh---'s and giggles.
Car ran a 12.28. So we know that the exhaust is restrictive and are going to work on that.