Thread: small blocks

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big question;
chevy small blocks, u can p[ut heads from one on to another, rite.
I was told a set of heads from any other than a 307 will not fit a 307, ayaa
what years did they make the 307, was it worth any thing ?? ?

I believe the production for the 307s went on into the 80's and the engine found it's way into most of the corporate line.

It was chevy's replacement for the 283, and the long stroke gave it good torque for it's size. This was a "bread and butter" engine and no factory preformance versions were offered.

The engine will respond to all the same preformance mods as other SB Chevys, but due to it's long stroke/small bore/small displacement configuration it would be hard to make a real high preformance/high winding engine out of it.

As Richard says any SB head will bolt up. I BELIEVE that 1.94 heads will work with no modifications, but if you decide to go with anything bigger, check for valve to deck interference problems before you start the engine.

One other thing to watch out for is that you get Chevy 307 heads. Oldsmobile also produced a 307 during that era, and those heads are totally different.

I thought the 307 was an Olds motor....i have seen it in many chevies from early 70s to late and was always told it was an Olds motor...chevy's was the 305, pontiac had the 301. but hey, I'm not a chevy guy, i hate walkin

anybody have info, or know of any links on this I'v never heard of a 307 by chevy, If there is one I'd like 2 learn more about it?.......................... hay "screamer' could I also get that link to the ford camaro, that you we're typing about the other day w/ the ford 350, when you have time ............. THANKS

You don't hear much about the 307 because it wasn't as good as the other motors, so it didn't sell. The major drawback to the 307 is that it had small bores, so small that they can't clear big valve heads. The 302 gives you the same displacement, but has 4" bores to clear big valve heads.

Here's a chart that gives you bores and strokes on many of the "modern" day motors. Note the differences between the Chev 307 and the Olds. http://atlas.spaceports.com/~1320web...s/engines.html

And here's one that is specific to Chevrolet engines with a few more data points. http://www.planet.net.au/~alexst/chev-spec.html

gentlemen .............. I sure appreciate all of your replies, as quick as you all did ............. many thanks to all of you .......

<<<<<<< " I WAS RITE " >>>>>>>>>>

thanks again .......... god bless

chevys4evr

Here's a link to chevy engines and codes.
www.nastyz28.com/sbcmenu.html

the 307 can be bored to 4.00 in. to make a 327. the early models had the 2.000 in. rods. this will made a good engine.


ricky

Originally posted by ricky
the 307 can be bored to 4.00 in. to make a 327. the early models had the 2.000 in. rods. this will made a good engine.


ricky

Do you mean a 2.00" rod bearing?

yes 2.000 rod bearing. i didn't know the 307 crank was the as the 327.