I built a 3.48 stroke x 4.125 Bore motor few years back and run it in my nova. Strong motor, pulls crazy from 3500-7000 plus. I have AFR 210 CNC heads and single plane intake with Holley EFI, all lightweight rotating assy, and very light clutch set up(26lbs with box)
If I was going to build it over I would go with more compression, and maybe bigger heads.
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Above Average Motorsports
1972 Nova, Ride Tech, Forgelines, Wilwood, Bowler Transmission, Lingenfelter, RAFT.
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