EngineStrokeRodRatioNotes
Ford 144 Six2.55.882.35 
Ford 240 Six3.186.792.13 
Ford 2812.755.72.07destroked 289 crank, 283 Chevy rod
Ford 351W3.506.651.90351M rods, 1.14 pistons
Ford 2800 V62.705.141.90 
Mopar 383-4003.386.351.88 
Ford 3523.506.541.87 
Ford 221-239 Fl3.757.01.87 
Ford 3023.005.561.85302 crank, 400 Chevy rod, 1.14 piston
Ford 4293.596.601.83 
Ford 3.0 V63.155.781.83 
Ford 2.9 V62.835.141.82 
Ford 351M3.506.651.80 
Mopar 413-4403.756.751.80 
Olds 400-4253.8757.001.80 
Chevy 2833.005.71.80 
Ford 2892.875.151.79 
Pontiac 326-4003.756.6251.77 
Olds 330-4033.396.001.77 
Merc 255 Flat4.007.01.75 
Chevy 3273.255.71.75 
Olds 350 Diesel3.395.851.73 
Ford 4.0 V63.325.7481.73 
Ford 3903.786.491.72 
Chevy 3503.486.01.726? rod, 1.26 piston
Ford 4603.856.601.71 
Ford 351W3.505.951.70 
Ford 315 (s)3.0765.2051.69stroked 302 crank, Pinto rod
Ford 3023.005.091.69 
Ford 4.6 Mod3.545.931.68 
Ford 383 (s)3.706.201.68stroked 351W crank, Eagle rods
Ford 375W (s)3.686.131.67stroked 351W crank, Mopar rod/piston
Ford 375C (s)3.686.131.67stroked 351C crank, Mopar rod
Ford 2300 Lima3.1265.2051.67 
Ford 2.5 HSC3.5835.991.67 
Ford 4004.006.651.66 
Ford 443 (s)4.036.701.66stroked 390 crank, Slant Six rod
Pontiac 421-4284.006.6251.66 
Ford 2.3 HSC3.305.451.65 
Ford 2000 Pinto3.024.981.65 
Chevy 3503.485.71.64** let’s use this as a baseline **
Ford 351C3.505.71.63 
Chevy 3963.766.131.63 
Ford 4283.986.491.63 
Ford 525 (s)4.2006.791.62stroked 460 crank, 240 Six rod
Chevy 383 (s)3.756.01.606? rod, 1.14 piston
Ford 170 Six2.944.7151.60 
Ford 347 (s)3.405.41.59destroked 351C crank, Eagle rod
Olds 4554.256.7351.58 
Pontiac 4554.216.6251.57 
Ford 300 Six46.211.55 
Ford 416 (s)4.066.211.53stroked 400 crank, 300 Six rod
Chevy 4544.006.131.53 
Ford 200 Six3.134.7151.51 
Ford 406w (s)4.066.121.50stroked 400 crank, 360 Mopar rod
Ford 351 (s)3.505.2051.49cut down 351C crank, Pinto rod
Chevy 4003.755.561.48 
Ford 430W (s)4.1876.131.46stroked 400 crank, Mopar rod
Chevy 427sb (s)4.005.71.43Callies crank
Ford 366 (s)3.605.151.43stroked 351C crank, 289 rod, in 289
Ford 454W (s)4.1875.851.40stroked 400 crank, Olds Diesel rod