Need An Upgrade Tranny SL6

i finished rebuilding my slant and have about 3500 miles on it. the engine is .080 over bored, .510/246 dur @ .050/108 LSA. fully ported head and portmatched intake/headers. aluminum intake and 600cfm holley 4150 DP. i weight the car at a truck stop and the car was 3050 with me and full tank.

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