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How can you tell 305 from 307?

Updated: 8/17/2019
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14y ago

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This is 305:
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And this is 307:
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14y ago
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Q: How can you tell 305 from 307?
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Will parts from a 305 motor fit on a 307 motor?

no I respectfully disagree. I am running 305 Chevy TBI heads on my 1971 Chevy 307 and all is very well.


Will Chevy 307 pistons fit on Chevy 305?

307 pistons are 3.875" diameter. 305 pistons are 3.736". It might be possible to bore a 305 large enough to accept the 307 pistons, but the wrist pin location would be .230" off because of the different stroke. In short, no.


Can you put a set of 307 heads on a 305 block?

Yes you can.


Are the motor mounts the same on a 307 and 305 chevy?

yes


Did 1986 caprice come with a 307?

no comes stock with a 305


WHich motor is better 305 or 307?

There is basically no difference. 305 is a Chevy engine and the 307 is a Cadillac engine. They are both the same and assembled by same company Well, on the other hand, it depends on how you look at it. The 305 Chevy is a 265 stroked with a 350 crank. The 307 Chevy is a 283 stroked with a 327 crank. In theory, the 305 should produce it's best torque at a lower rpm than the 307. However, the 307 should be able to rev higher and produce a higher peak horsepower. Kinda depends on what you need it for. There is also a 307 produced by Oldsmobile that is a V8 engine. It shares no other commonalities with a small block Chevy.


Would it be ok to put 305 heads on a 307 block?

Yes, I've got a 307 running 305 heads in my old truck. I read somewhere it's actually worth a few extra horsepower


Is the Oldsmobile 305 engine the same as the Chevy 305?

Oldsmobile used to make a 307 V8, but it has nothing in common with a Chevy V8.


Does the 1987 Caprice Classic 5.0 carbureted have a Chevy 305 engine or an olds 307?

A 1987 Chevy Caprice Classic with the original engine does have a carb and the engine is a 305, because I have one. This can have a 307. I have an 87 Caprice Estate Wagon, with a 5.0 liter 307 olds. Which, is actually for sale.


Will Chevy 305 heads fit on a Chevy 307?

Yes they will, but 305 heads have a smaller combustion chamber so it may raise your compression ratio.


What is 1986 Oldsmobile 305 horsepower?

Oldsmobile used 307s in those days, not 305s - the 307 had 140 hp


What is a Chevy 305 engine bored 040 over called?

That would be called a Chevy 307 bored .40 over.