Sorry this is long but here we go.
I have been at the track the last few weekends racing Hot Rod/Super Street. Unfortunately, I was eliminated a little earlier than I would have liked on Sunday and was able to made a couple of wide open test hits. I have done quite a bit to my car and I was fully expecting it to pick up. I will describe my previous combo and what has changed and you guys can offer advice.

Original Engine Combo
512 cubic inch 400 based engine
3.380 Bore - 4.250 Stroke
13.5 Compression
Max Wedge ported Indy SR – ported by Jeff at Modern
1.5 Ratio Harland Sharpe Rockers
1050 Chuck Nytten Gas dominator
Indy 4500 Intake with approximately 3/4” of spacer
Hooker Fender well headers (44” Primary Tubes) with 3.5 inch exhaust exciting before the rear tires
Scott Brown Roller Cam – 630 lift with 1.5 rocker, 278 Duration@ 50, 112 centerline

Transmission
Powerglide with 1.80 Straight cut gear set
5600 PTI 8” Converter

Rear End
Mark Williams Sheet metal 9” with aluminum center section and rifle drilled 40 spline axles. 456 Gears

Chassis
1971 Demon all steel except fiberglass hood, deck lid front and rear bumpers
Full cage with round tube back half
Factory Glass
6 pack hood scoop – carb not sealed.
Stock engine compartment with inner fenders except where headers go through
Factory dash
4 Link rear suspension
Custom built rack and pinion Front suspension.
QA 1 Double adjustable Front Shocks
QA 1 Double adjustable Rear Coil Overs
Anti Sway bar
Goodyear 24” front tire
Goodyear 32 x 15.5 x 15
Car weighs 3040 pounds with my big butt in it.

Best ET with this combo is 9.58 @ 139 with a 1.36 60’. That took placing the fall in 2007 and I don’t have a corrected altitude.

1st set of changes I made.

Changed Heads from Ported SR’s to INDY -1’s CNC 325
Replaced the 1.5 Rockers with 1.6 Rockers
Went from Hooker Fenderwell Headers (44” primary) to shorter Headman Hustlers (36” primary) – both 2”
Removed the exhaust
Removed non sealed 6 pack hood scoop and added a sealed pro stock scoop.
Replaced the PTC converter with an A1 that stalled at 6200
Replaced Goodyears with Hoosiers. 26”on front, 32”x15.5” x 15 Slicks

September 2013 – Corrected Altitude - 3409
60’ 1.401
330’ 3.973
660’ 6.145
Mph 113.20
1000 8.029
1/4 9.625
Mph 140.75

2nd Set of Changes

Lowered the Stall to 5600 to try to get the pig to leave
Added a Star Machine Vacuum pump and puke can

June 2014 – Corrected Altitude - 3971
60’ 1.386
330’ 3.958
660’ 6.139
Mph 112.78
1000’ 8.029
1/4 9.636
Mph 140.14

To be honest I thought that it would pick up a bit. In the past removing the exhaust was a tenth. The shorter headers were a 15 – 17 horsepower better on the dyno. I thought the heads would be a wash. I thought that the rockers would help a tiny bit too. Also sealing the scoop to the carb is supposed to be the best thing since nitros.

Any Input would be appreciated and any suggestions. I would really like to get this thing to leave.