I found this ....

Quote


P5249207 3.75 stroke, full radius, balanced
P5249208 4.15 stroke, full radius, balanced
P5249503 4.15 stroke, full radius, unbalanced
P4529095 3.75 stroke, full radius, replacement for P3690285 Kellogg crank, unbalanced
P5249164 Unmachined 1053 steel forging

Each of these eight-bolt cranks is made of 1053 steel, and they're now nitrided rather than Tufftrided.


here Hemi crank


running up my post count some more .