307 Pistons

[pat123]

Anyone know the availability on 307 pistons and possibly bored over pistons?
Also if anyone could give me a price estimate or a place to buy?

Thanks Pat

[cdowns]

try your loal auto parts store

[Sinister]

Try Summit or Jegs as well.

[LONGHAIR]

307 stuff is still out there, they are not rare by any means. Parts should be available in nearly any city.

I don't know if I would spend a bunch of money rebuilding one though? The cost at the machine shop is going to be the same reguardless of the engine size, so unless you are trying to keep a "numbers matching" restoration? You can get more bang for you buck from a 350.

[williamt]

northern auto parts has them re build that bad boy don't be like every one else who needs a 350 my 68 came with a 307 and it is newly rebuilt why get rid of a good motor just to be like the masses

[LONGHAIR]

Originally Posted by williamt

northern auto parts has them re build that bad boy don't be like every one else who needs a 350 my 68 came with a 307 and it is newly rebuilt why get rid of a good motor just to be like the masses

It's not about "being like the masses". You will get more power for the money working with a 350 than you will with those small-bore engines. All of the rest of the parts are exactly the same, but you will get more from your performance parts with the bigger displacement.

[williamt]

yep more bang for the buck it just gets old old hearing get rid of a good motor when someone ask a specific question about that motor if some says what do I need for more power or torque in my 307 or where do I find a part for my 307 the answer isnt in a 350 but the good thing about our country is we all can have our own veiws. even about hondas but I still anit figured that one out yet

[mr48chev]

It may not be sitting on the shelf at your local parts house but it is out there.

I guess the first question should be, do you need standard or oversize?
rock auto shows them but they are special order
TC1737
The O'Rieley chain of sotrs shows them for about 12 dollars more ea on line so shopping around may save a bit of cash.

Here is a deal on Ebay that may be hard to beat.
the whole engine kit and you pick the piston and bearing sizes.
http://cgi.ebay.com/ebaymotors/Chevr...Q5fAccessories

You might check www.northernautoparts.com for a similar kit.

[mr48chev]

I went and checked Northern auto parts
http://www.northernautoparts.com/Pro...?ProductId=627

It would come out about the same with frieght and I have been satisfied with everything they sold me.
There are also a set of standard pistons with rings and a set of .060 over pistons with rings on Ebay for 145.00
http://shop.ebay.com/?_from=R40&_trk...All-Categories
As the guys said, they are out there you just have to hunt for them.

[pat123]

I managed to find some at my local auto store. A guy told me that they would be hard to find but i had no problems, and they arent that much more money either. They said they could get them .020, .030, and .060 over. Im thinking .030 over.

[williamt]

good for you put in a mild cam and some good heads and tell every one yeah its a 307

[Tx Firefighter]

307 crankshaft plus a 350 block equals a 327, one of the finest engines to ever spin a tire.

[capev86]

bah....still a short stroke motor.....

a 327 is like the chevy v8 version of a honda 4 banger. torque is more important than horsepower in a truck.

give me a 305 or 350 with a stroker crank any day in a truck. my "new" 72 burb 3/4 ton 2wd has the 307 and a 3 on the tree. it is geared really low and the 307 is tuned for low end power, but that won't deter me from swapping in my low mile 406sbc and getting a more highway friendly rear gear. low end pulling and cruising power is what i like!

[jim zag]

My truck came with a 307 and I did a simple rebuild and put a set of late model 305 4 barrel heads on it with a COMP 268H cam in it. It ran very nice. Go ahead and rebuild it!

[pat123]

So heres what im putting into it. Edelbrock 64cc heads, 500cfm edelbrock carb, square flange edelbrock rpm intake, flat top pistons, and shorty headers. So my question is what cam do i want?

[special-K]

That all sounds good.I`d go with what they call an RV cam.1st or 2nd step up from stock on lift.Low end torque and good hiway milage.I like the 268 idea.

Honda four-banger/327...I don`t see the ressemblence.Most Super Sports ran 327s as well as C/50s and C2s...375hp.That motor wore alot of hats.

[capev86]

a 327 is a short stroke, whereas the 305, 350 and 400 are all long stroke motors. yes the 327 was a hi-power car in its day, but its place was on the drag strip where 6,000 rpm is expected. it makes high end horsepower i'd take a nicely built 305 over it any day in a truck where you need a more moderate powerband. i bet a 305 with a stroker crank would beat a 327 all else being equal because it would have more get up and go power. my 406 is soo sweet. like 1mpg less fuel mileage and waaaaay more power than a 350 of the same vintage. the longer the lever arm (crankshaft), the more force you are generating with the same amount of effort.

my 307 will do for now, but give a long stroke motor in a truck. and i do agree with the rv cam. my dad did a lot of trailering with his 72 suburban with a transplanted 305 (in place of the tired 350) and an rv cam.

[special-K]

Originally Posted by capev86

a 327 is a short stroke, whereas the 305, 350 and 400 are all long stroke motors. yes the 327 was a hi-power car in its day, but its place was on the drag strip where 6,000 rpm is expected. it makes high end horsepower i'd take a nicely built 305 over it any day in a truck where you need a more moderate powerband. i bet a 305 with a stroker crank would beat a 327 all else being equal because it would have more get up and go power. my 406 is soo sweet. like 1mpg less fuel mileage and waaaaay more power than a 350 of the same vintage. the longer the lever arm (crankshaft), the more force you are generating with the same amount of effort.

my 307 will do for now, but give a long stroke motor in a truck. and i do agree with the rv cam. my dad did a lot of trailering with his 72 suburban with a transplanted 305 (in place of the tired 350) and an rv cam.

I guess...It does make me wonder why GM so extensively used the 327 in trucks,yet never ever offered the 305 in anything but the lightest trucks and cars.This during the`80s when downsizing of cubic inches was the way,across the board.You could never get a 305 in a one ton.Maybe not a C/20...not sure.I worked for a company that ordered 3 new trucks in`82 or`83:A C/20 with 350/4spd,C/10 with 305/4spd,and a C/10 with 305/auto.The C/10s were total dogs (empty).The 4spd one you were better off starting in granny than lugging it out in 2nd.The auto equipped one was mine to use.It was a Silverado and I could feel the power drop when using the a/c.The C/20 was used by the masonry crew and was the only one out of the three that I considered a truck worth having.My boss started sub-contracting the masonry to the lead mason,which freed up the C/20.I took that truck,the laborers got the C/10,and the superintendant got my Silverado.I`d rather drive with no a/c than that gutless truck all day.My personal vehicle at the time was a`71 K/20 with a 307/4spd.That truck had so much more usable power than those others it wasn`t funny.I guess the`80s trucks had the tall gears.The C/20 probably had 3.73s

Those 307s are hard to kill

[capev86]

if i wanted top end performance only, i'd buy a honda. stroker small blocks are very popular even on the drag strip. you can pull better numbers with softer gearing!

[BluTrukker]

I can scratch 2nd with a 307 and 3OTT, so don't let anyone tell you they are weak. I like it for the same reason guys like inline sixes, because it is a little different. Anyone can have a crate motor.

[SacramentoJoe]

I keep trying to blow up my 307 so I can rebuild it. It just won't let go. Maybe if I rebuild the Rochester 2-BBL, I can burn out my rings. It has been a great motor and I plan on keeping it.

[smn69]

Didn't I read somewhere that a 307 is a stroked 283? I rebuilt mine just because it is the original engine to the truck and it runs and performs great!

[Average Joe]

283= 3" stroke and 3 7/8" bore. 307= 3 1/4" stroke and same 3 7/8" bore. 283 is small journal whereas 307 large journal. My burb runs a 283 and sm465 4 speed. Thought about swapping it for my 454 in my truck but like my gas mileage. I just got back from a 180 mile roundtrip towing a 3500 pound trailer with the burb and averaged 13.5 mpg. However going up 6% grade I was in third gear going 35 mph.

[Tx Firefighter]

There were also large journal 283 engines at the very end of the production run. Rare for sure, but they are out there.

[pat123]

so what exactly is an rv cam?