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completely new designs optimized for today s bigger engines industry leading ... cfd airflow design software utilized for optimized air/fuel distribution and ... .50 rear 4.50 application 1975-86 262-400 sb chevy v8 1987-later w alum heads 262 ... -400 sb using 1996 later vortec l31 iron ... plane design builds maximum torque hp for stout street/strip engines fully cnc ... machined for a perfect fit · square bore carburetor ... rear 5.27 application 8150 1975-86 262-400 sb chevy v8 1987-later w alum heads 262 ... -400 sb using 1996 later vortec l31 iron ... and promote airflow between the hot engine and the intake application 8501 1975-86 ... 262-400 sb chevy v8 1987-later w alum heads 262-400 sb ... everbright 8501c 8502c 7620 team g big block chevy race manifolds features open ...