hi guys.
i have a serious itch on my butt (sorry) call me crazy if you like but...
i have a 1969 327 short block at home, to be repaired, and my old 1980-350 4bolt main (running on my car presently) will need overhaul soon (oil burning).
here is were it does itch...
the journals are both same size including those for the connecting rods. the connecting rods are both 5.7, so if i get the right pistons...i can get a 327 4 bolt like it was never done before (at least not that i'm aware of...)
adding my 58cc heads (1.84 I / 1.50 E valves) with my aluminium manifold and my headers and the ol' rochester carb, and my nwcT-5...
i think i can end up with something somewhat different and juicy
don't you think?
i love the torque of the 350 and the hi-reving of the 327
i think i'm goin' loco.
Fernando.

 

Just my opinion, but your heads won't be a match for a high revving engine.

We'll forget about asking you the reason why you'd want to lose cubic inches

 

that's a good point bro. i'll consider better heads, and as far as cubic inches...
to me is just not an extremelly important issue, sure i love the power, but that's my daily driver and is not intended ever to visit the tracks.
thanks again for your input. yours:
Fernando.

 

most (if not all) 327's were small journal motors, same bore and rod length as a 350 just a different stroke. 327 large journal cranks are around (not sure when they came out ) and will swap right into your 350 block. 327 have a "better" rod/stroke ratio than a 350 (some say a 327 has the optimal ratio). their great motors, better flowing heads and a good flowing intake will help a lot. you might loose a little on the bottom end but should be able to make it up over the rpm range. i had a friend with a 327 in a 85 z and it kicked @ss. pulled to about 7200 too. good motor ,easy swap and it's different. i say go for it.

 

327 is a kick *** SBC, better then the 350 IMO probley equal or a hair under the 400, you forsure need some breathing heads, they do have a few large main 327's i think all the high perf ones where, these engines can spin and make all kinds of horsepower! i say go for it!

 

sure you don't have a 2 bolt 350 block and think it's a 327? i don't think there were any 327s in 69. check the strock to be sure what you have. as far as power the 350 would be a better choice all else being equal.

 

hi to all.
i did check the casting numbers with the good guys at MORTEC and we came to the conclussion that the block was intended for both 327 / 350 as well (2 bolt main)
then the casting number of the crank is a 327 with the big journals (it will sit perfectly on any 350 block) the stroke is short (3.25) against 3.48 for the 350 and the size of the journals for the connecting rods is the same AND there's more...
the 305, 327 and 350 used the same 5.7 connecting rods.
another thing; it was on a 1 ton chevy truck 1969, but it might be the ones built at the last half on 1968.
another curiosity... the original heads were ridiculous, they had an anormous 76cc chambers with the puny little 1.74 intake valves and a 2 barrel carb, no need to tell that i thrown all that to the garbagge, it had flat top pistons (the only good thing)
so i think it can't be worst with my 58cc. 1.84 I / 1.50 heads and flat top pistons with molly rings,
what do ya guys tink?

 

I have a 69 large journal cast complete in my garage right now...Kevin

 

Large journals came out in 1968, same year as the 350.

I had a truck 327 short block I rebuilt. It had large journals.

I agree on the head part. Get Sportsman IIs, clean up the bowls & ports, nice cam, you'll be ready to rock.

Your 5 speed may not stay too happy with you, though.

 

Yeppers...all the more reason to build a 350...just guessing here (without price comparing) but I'd imagine that for the price of the pistons for a 327, you'd be pretty close to being on your way for a 3.48inch crank.

But let me go on record as saying I have no problems building a 327...I want to make this clear. But if you're sitting on a 350, it doesn't make $$-vs-HP-vs-Tq-sense to build the 327.

 

Ya know, that may be your opinion, but it's no where close to being factual...not meant as a flame, please don't take it that way.

I agree it's a "kick-***" engine, but come on..."just a hair under a 400"....

 

I wonder why everybody thinks the 327 is so much more expensive than a 350 to build. Just pricing keith black hypers in summit. 350 pistons $173 a set. 327 pistons $187 a set. The large journal motors use all the same bearings as a 350 too. So theres really no difference in cost cept the minor difference in the piston cost.

 

Exacto !!!
there is no much more money to put into, just the pistons are different, the rest is exactly the same.
another thing, the 327 revving at the same speed of the 350 is actually doing less effort because of the shorter distance travelled, example
1- a 327 @ 5000rpm = 507.8 feet (3.25 x 5000 / 32 = 507.8125 )
2- a 350 @ 5000rpm = 543.75feet (3.48 x 5000/32 = 543.75 )
plain and simple mathematics, the 327 doen't have to work too hard to do the same job .
Fernando.

 

A basic comparison between a 327/350 is if you use the same heads,cam,intake ,etc. the 350 is going to put out more hp and the 327 should rev-up faster due to the shorter stroke. The weight,tire size andgearing would determine which engine would be the better choice.Unless a vehicle is built for a specific use cubic inches is almost always a better choice.

 

ooopppsss!!! silly me
the final results should be multiplied by 2 because the piston moves twice per revolution, so the final figures are:
1015.6 feet/min for the 327 and 1087.5 feet/min for the 350
E-Z Roller is correct in his oppinion and more, all of you ARE RIGHT as well, in the end it comes just to a matter of taste and compromise as everything in the industry (i want it this colour, with this much power and with this sound system etc. etc. etc. )
by the way my camaro is a 87 rs with a 3:42 open diff, it was 2.8mpfi (what a crap) and now is 350 carburated (the good old ways) nwcT5. to whom i'm being nice.
then again i still think that a 327 4 bolt main ROCKS
Fernando.

 

a buddy of mine has a 70 (i think maybe be a 71) SS chevell with a 327 in it...oh damn its mean as hell fastest cars ive ever rode in..it would definetly kill a new SS i think he runs mid-11s in it

 

The 327s became large journal in 1968.

The 350 was introduced in 1967 in the Camaro SS. Only the Camaro for the first year.

It was large journal.

jms

 

I took my 68 327 out of my 70 pickup and put it in my 87 formula last month. I dumped all the lg4 crap on it though. Dont think the intake is limiting me but the exhaust definately is. The final gear ratio was the same from my pickup to car(both cruise at 60mph at 2250 rpm). Plus the truck was 1000lbs heavier. The truck flew, the car is slow at the moment(gotta be the exhaust). Its definately much, much faster than the 305 though I've owned this motor since I was 15 and have had it in all kinds of cars. (68 impala,68 chevelle, 80 pickup,70 pickup, and now the bird) Its been strongest in the truck(towed boat horse trailer etc. so much for no torque) but most fun in the chevelle(original big block car with floor shift 3 spd). It gets great mileage and has been extremely durable. My new 355 in the truck pulls a little harder but it uses more gas. Everythings a trade off. Personally I think the 327 is one of the best motors ever.

 

to the good people who disagrees i'm deeply sorry but as the time goes by...
i feel more and more tempted to do it.
it'll be done on the summer and will keep everybody posted
Fern.