great info guys sorry it didnt dawn on me that the crank is what modifies the stroke not the rods (laughs at self) but now im really curious what about the pistons from a 360 could i get them on a 318 rod and bore out my holes to take them just asking cause im about to rebuild the virgin 318 that gose in my belvedere and i got some 360 guts that im likely to never use unless some find there way into this engine ps im not actually tring to build a 340 it was more of a joke