Crate motor could be anything but "crate motors" did not become available until long after the 327 was no longer produced. Most likely a 350.
250 HP, regular fuel 327s were equipped with small (torque) heads, cast pistons, rods and crankshaft and a Rochester 4GC carburetor. HP 300 HP 327s were equipped with forged crankshafts, rods and pistons (flat top), a single Carter AFB carburetor with cast iron intake manifold and 1.94 double hump heads. SHP 327s were equipped with forged crankshafts, rods, pistons (pop up) and 2X4 Carter AFBs with an aluminum intake manifold. Exhaust manifolds, pipes, mufflers and tailpipes were larger on 300 and higher HP 327s. The last SHP 327s, e.g., 350 HP, etc., were equipped with Holley carburetors.
Inspect the intake manifold. If it truly was a crate motor, it almost certainly came with an aluminum intake manifold designed for a Holley carburetor. Unless it has 2.02 heads (unlikely), headers, and a very big camshaft (again unlikely) a 550-600 CFM carburetor with vacuum secondaries would be about right.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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