Why do you think you need an 8000 rpm launch speed? That 8" 7400 seemed to work better than the higher stall 7" units. What exactly do you twist this thing to and what is it? Also what trans, gear ratio, rear gear and race weight would help. Where are you getting these converters from and who was modifying them?
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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