Chevy 307 to 350 Swap..

I've Read That Everything was Interchangable. That The 307 Parts will work on the 350. Am I Correct?

 

yes, sbc to sbc is all the same.

 

they will fit. they just might not work the way you want them to.

 

All parts will work. Short block is the only difference.

 

Cool. That's what I read by Research. Also, It Should Mount Right In to the 307 Mounts? What about The Intake and Headers? I have both from the 307.

 

Yup. Everything fits.

 

All external components are interchangeable, ie intake, exhaust, carb, distributor, water pump, accessory brackets, motor mounts, starter, pulleys, etc.

 

One exception, short pump vs long pump, pulleys don't interchange.

 

the 307 has a bore of 3.875 (283) and stroke of 3.250 (327) and the 350 has a bore of 4.000 and stroke of 3.480 so everything will interchange except for the pistions so what you'll end up with is a Large journal 327. In fact i've been told Large journal 327's ( 68'-69') used 350 2 bolt main blocks. But everything else heads,manifold,headers,etc. should all bolt up and mount right in the same place.

 

Ditto on all of the above!!...

Got her done yet???...
What are you waiting for???...

 

You might want to save the 307 crank for a 327/331 engine build... Hell, I would!!!...

 

If Vortec, intake manifold has different bolt pattern. Your early performance manifold won't fit Vortec heads.

 

That is the main thing to worry about when swapping one for the other. The intake has to match the heads bolt pattern wise.

Swapping 307 heads and intakes to a 350 works but in some cases may not give the performance that you want. Some low performance 350's even came equipped with the same pieces.

As for running a car in the garage and swapping from a 307 to a 350 it's and out and ins swap. The motor mounts have to match a small block to the chassis and aren't displacement specific except small block/big block.

 

YOu didn't say what year 350. There are several things on later model 350s that are not the same as a 307. Starting around 1987, the flywheel, valve covers and some other things are different. The early 90s LT1 type engines have a completely different cooling system. 96-up engines use a completely different intake manifold. They did away with the fuel pump mounting hole in the late 80s/early 90s.

So yeah, an early 350 will swap into where a 307 was no problem...but not a later 350, unless you make a few changes

 

The exhaust manifolds don't all interchange. The 305/307 have two bolt holes drilled in the head for the end exhaust port, those won't work with a 350 head. The 350 manifold covers the bolt hole.

There are only a few little gotchas but all have easy work arounds, that's why the SBC is the best swap choice for almost all street rods.

 

The 307 never came with the manifold that uses the extra bolt hole. Only 305 and 350s did, late 70s/early 80s.