So I'm looking at two different double rollers for the poly in my 65. One is S.A. Gear (made in Chicago) which is .250" and the other is Edelbrock (Cloyes) 7803 Which is .170. Obviously the SA is larger, but on a stock poly is there any benefit? They are both the same price. I'm tempted to go with the S.A. but do I put more faith in Edelbrock (Cloyes), particularly since Cloyes has been getting some bad reports of poor quality chains?