340 headers?

MrMopar said
Desk top dyno is a joke, you can't go by that, I have one of those programs and its fun to play with but thats all. None of the numbers came up at the track like they do on the drag strip dyno. I should be in the 12's according to them. I re-tuned of course, I have an air/fuel ratio guage inside the car and re-jetted the carb, re-curved the distributor, yada yada yada. Its all good, and I am no rookie to this performance thing. I WILL NOT pay $800.00 for TTI headers after reading how they rust, some have clearance trouble if you read some other posts, and maybe capture the starter. Oh, ya if they do then thats another $130.00 for a mini starter. Desk top dyno is exactly what it is, not real world, out in the wind, heat, humidity, track condition etc. I'm done with this.

I think the reason you are not hitting the 12's is because of the high geared rearend you say you are running in your sig. 3.21s are high and are not really a performance gearing such as 3.91's or 4.10's, granted with those you probably wouldn't be happy driving on a freeway or highway. That is just my opinion anyway.