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Possible that the big tires, 4.10 gear, and glide are hurting your times? IMO you need more gear.

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I would go with more stall like 5800-6000, less timing, like 32*, stock jetting 92's square and start there. Like one guy said, you may need a 456, but I think 8's are in your future with the right tune up.

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What do you have for jets and what is the finish line RPM? The peak tourque looks to be at 5500 so I would want a 9" converter at 300 over that, and where was the timing on the dyno? Is the converter able to be be efficient at the finish line? Did you move it around? I too think a 456 or more gear would help, but maybe a 10th, and it should pick up more with the tune up. I don't think 870HP is anywhere near an 8.50 in a 3000# car. 8.80-8.90@ around 148-150 would be my guess. JMO these are the questions you need to answer.

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I would go with more stall like 5800-6000, less timing, like 32*, stock jetting 92's square and start there. Like one guy said, you may need a 456, but I think 8's are in your future with the right tune up.

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Thanks for asking , but I think it`s adequate.
The fuel system has a 5 Gal. fuel cell #12 from the cell to the BG filter and BG400 pump then #10 to the BG reg and #8 to the carb. I`m getting 9 # at the line.

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Thanks for asking , but I think it`s adequate.
The fuel system has a 5 Gal. fuel cell #12 from the cell to the BG filter and BG400 pump then #10 to the BG reg and #8 to the carb. I`m getting 9 # at the line.

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have you ever looked at your plugs? is it possible that your flooding the carb going down the track with it at 9lbs? I run 5.5 lbs with 2 carbs and have no problems

i would think a big chamber like a hemi needs more timing but I have no idea

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Definitely a possibility , the plugs do look OK after a run . And the timing is set the same on the dyno pull @ 35 deg . To be down the HP mine seems to be I`d expect to feel it miss or shoot ducks down the track . But that`s definitely not the case .

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I would do a fuel flow test to see how much time it
takes to fill a gal... for some reason your down about
200 hp

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I usually pump out my fuel cell by disconnecting the fuel line at a bulkhead fitting on the firewall after a race day. It sure comes out of there scary fast , I haven`t disconnected the carb fittings and watched that however. I better get on that . Sure hope it`s something that simple !!!!