Hi Rich, Since you offered an opinion on the Toro with the 2 bbl carb, I am replying to you with a few comments and a couple of photos to see if what you say and a few of us have been thinking and tinkering toward with the 2 bbl Toro, is actually possible to happen. Have you actually seen one? We know that there is an emmission component to the design of this engine with the Reed system. What we don't know is did it meet the design goals. By chance are you one of the designers?, before I put my whole foot in my mouth. The piston does not travel far enough down on the downstroke to completely uncover the two directional ports in cylinder walls. If you haven't seen one, these ports are the only ports into the cylinder and are shared by the transfers from the "main" intake port into the crankcase under the carb. If the main port and the Reed ports were two different systems this arrangement would be easier to understand but as it is, it is not. The Reeds have a very short duration of time to do anything so if any gains can be made by feeding more air/fuel through the rubber hoses to the reeds remains to be seen, but not for much longer. I just finshed an adpter plate with transitional porting to go from a cut down and slotted 2 bbl intake manifold to a WT 324 carb's 5/8" (about 15mm) at the throttle plate bore. This was a challenge to do and I haven't run it yet. I still need to make a throttle linkage for a servo, but I can run it as it is. I got tired of wondering, and speculating, and just started working on it. We shall see now. Here is some photos. The engine with the aluminum extended linkage is a 1 bbl engine with a low profile carb spacer.