i would go with the 305 everybody and their brother has a 350 im not saying that i dont like them its just that every one's got one. go with the 305 you will be able to make all the torque you want the way i see it you can make anything fast its just how much money you want to spend. the 350 would be easier to get more power out of but you can do the same with the 305. i think that it is up to want to have in your truck they are both good motors. as for the 305 yes it will have less torque in stock form than the 350 (in stock form) but you can build the 305 to keep right up with with any 350 on the street and you can do the same with a 350 so its all up to what you want