I built the 505" 440 based block combo.

I used the Molnar 4.25 crank and 7.1" Chevy sized journal rods

Everything fit with no grinding and this is the funnest motor I have ever built! It has more torque than you can ever use on the street.

Put some good heads on and you will have a motor that is easy to drive but will lay down impressive times at the dragstrip.