I'm new to Cadillac engines but I've got this 1955 331 I am putting in a '40 Ford. This motor originally had four heater hose nipples, two for heat and two for the hydramatic. One on the block at the rear under cylinder 8, one at the rear of the water pump, and two off the side of the water pump. Which ones are the pressure and which are the return side on this, I'll need to plug off two of them. Can the nipple on the side of the block be unscrewed and replaced with a pipe plug? Underneath that there is what appears to be an oil line that has a check valve in it. Is this the supply or return oil line for the oil filter, or something else? Moriarity was kind enough to take some pictures of his setup but I believe his is an earlier engine so some things are a little different. Speaking of oil lines, I have this loop on top going from the block to the oil filler tube. My initial thought was this is the oil filter pressure and return until I saw the other fitting on the back of the block I just mentioned... This is an obvious one I hope, it has a wcfb that I will likely rebuild and run. I assume this vacuum pot is for an air conditioned car to increase the idle speed, or possibly a dashpot for the hydramatic. Either way I think it's safe to remove it... Speaking of the carb, what's the best way to hook up this choke? I have a good heat riser that bolts to the passenger exhaust manifold, but my manifold and heat riser don't have a provision for a tube. I'd like to get away from the heat riser if possible. That should get me started for now. Thanks for any help!