Buy the new 426 type Crower forged steel crank and have it made the way you want it I use to buy used Top fueler cranks like those, a lot of guys did in SO CA and use them in wedge motors, it takes some work and modifications to make them fit and work. That was before the cheaper Chinese imported cranks where available. I buy and use the forged 4340 Ohio brand stroker cranks now, they have the Hemi 8 bolt flange on them BTW, Ohio Crankshaft CO is offering billet steel cranks now also