my combo is my first big bore long stroke deal, i origanally wanted to do a big bore short stroke motor cuz of the weight of the car, i wanted a 540ci but mike @ muscle motors didnt have a 4.250 crank on hand and offered a 4.50 crank for the same money so i said ok, as light as my car is turning out i see its going to be a struggle to get it to hook with the long arm crank, im going to try it as is and if its a pain to get the car to hook up then ill change to a short stroke maybe in the 3.75 - 4.25 stroke to calm the low end down. this is going to be a run what you brung type car not a bracket or class type car.