Hello! I dont have an a body but thought i might get some good feedback on this forum. I'm building a 440 for a 1967 D100 2wd short utiline pickup. It is your standard 1978 rv 7.8:1 compression low milage motor. Summit 6400 cam, template ported 452 heads, factory dual plane 4v intake with egr stuff brazed shut, holley 750dp, truck headers. Pretty mild. This is a basic drive for fun, no racing, weekend truck. No heavy towing...maybe a 2500lb boat at the most...maybe. According to factory specs, the truck's curb weight should be around 3600lbs. Rearend is an 8.75 sure grip with 3.55 gears. I have an A833 OD iron case transmission I'm putting behind an American Powertrain bellhousing. Hydraulic clutch. This accepts both 10.5" and 11" flywheel/clutches. I want to use a good oem grade clutch such as luk, exedy, sachs, etc. Any reason why I should go 10.5" over the 11"? I've heard the bigger clutches are harder on synchros when shifting because of the extra weight inertia. All the factory stuff was 11" in the trucks, but that was a long time ago and new clutches seem to hold better than the older stuff. Would a 10.5" be a better choice? The price difference is just about a wash but the 10.5 seems better supported. Any info would be much appreciated. Thanks!