4.5 crank
Yes you can fit a 4.5 stroke in a stock 454 block . I have done it wit an eagle crank , eaggle h-beam rods and cutom J&E pistons . It was not easy . I had to machine to O.D. of the counter weights off the crankshaft which required a lot of extra work on the balancer and plenty of heavy metal . The pistons have a 1.145 compression height . The end result was a 518 cubic inch BBC for a motorhome . Massive torque output . i am now putting that same engine on an airboat .