Stroker combinations for Small Block Chevrolet  

CID   Block   Bore   OverBore   Crank   Stroke   RodLength      Notes   
334  305  3.766  .030  400  3.75  5.565 or 5.7  Crank main journals ground to 305 main size Must check rod balance pad to piston clearance (underside of pston cup)  
366  350  4  .030  350  3.6  5.7 or 6.0  Must ofset gridn crank to achieve 3.60 stroke Must check rod balance pad to piston clearance (underside of piston cup) when using 6.0 rod  
377  400  4.125  .030  350  3.48  5.7 or 6.0  User spacers and 350 main bearings or use special spacer bearings  
383  350  4  .030  400  3.75  5.565, 5.7, 6.0  Turn crank main journals to 350 main size or use custom 383 crank  
410  400  4.125  .015  400  3.81  6.0  Offset grind crank to 3.81 stroke Check rod to block and rod to cam clearance  
420  400  4.125  .015  Custom  3.875  5.85  Check rod to block and rod to cam clearance  
434  Custom  4.155  None  Custom  4  6.0 or 6.125  Use Dart or GM Rocket block with .391 raised cam  
454  Custom  4.19  None  Custom  4.125  6.0 or 6.125  Use Dart or GM Rocket block with .391 raised cam