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Can you put 305 heads on a 350 and what head gaskets need to be used 305 or 350?
Wiki User
∙ 9y ago
First of all, if 305 head will fit on a 350 block, and I don't think they do, why would you want to? The idea is to get bigger or same size heads. As far as the gasket goes, your block dictates the size of the gasket. However that's a moot point since the gasket/head/block have to fit together in order to work.
Obviously Tim does not know much about small block Chevrolet engines. All small block heads from the same generation will mix and match from the 265 to a small block 400. The only exception is that if any heads are used on a SB 400 that weren't designed for it, you have to drill small holes between the cylinders for an extra coolant passage. This is one reason why Chevys are so popular with enthusiasts. There are even ways to use different crankshaft, connecting rods and pistons to make stroker engines. Use the head gaskets that match the block for sure. Tim also says the idea is to go bigger or same size. How do we know what the authors ideas are? We can't read his mind. He may be on a limited budget, and the 305 heads may be all he has. Good luck, the possibilities are almost endless.
Yes, you can put 305 heads on a 350. The smaller valves will lower the peak horsepower, but it will have much better low end torque. Also, the smaller combustion chambers will increase the compression ratio enough to require premium fuel.
Wiki User
∙ 9y ago
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