I have done some research on cranks, I've seen Molnar makes one for 4 inch stroke as do a few others its going to be awhile before I do anything with the motor, I have a few people that want to buy the motor as is I guess for the Indy heads and the " R ' block. It all depends on my finances the next few months, it will determine if I sell it or not. My just finished back up 367 bent a valve after 15 runs that problem has to be addressed first.