I am building a stroker small block for my 73 Scamp right now.If you are deciding on cranks then don't do what I did.I ordered a 4.00 Eagle cast because it was cheap and I can internally balance it anyway.Get a Scat or better.The difference between the Eagle and Scat cranks is the Eagle cranks have less meat on them,usually leading to cracked and destroyed cranks.Scat is stronger and actually made 4.00 cranks for Mopar years ago.My set up in a nasty street car is:340 block .030 over w/ diamond pistons,10.5 comp,Eagle H beam rods,Eagle cast crank,W-2 heads that have been worked to the max,W-2 Holley Strip Dom intake that's had work done to it,950 Holley Ultra,custom ground hydraulic roller cam for my particular car(machinist is taking care of that and working with the company on it).We'll be pushing that motor to the absolute max.We figure to get around 550-580 pump gas hp in a car that should be able to be driven regularly.