What are some of the tell tale signs, besides a block stamping , that says this engine is a 350 or is this a 327
327 always has a valley vent at the back of the block just behind the intake manifold so does a 283...
I think the only way to tell for sure is the stamped numbers on the pad in front of the passenger side head.(on the block).that is with out taking it apart.. squirrel!..you out there?
to deuce roadster... ok ...realy?...I didn't know that... wonder why they would revert back? to relieve pressure?...interesting...new info thanks...
1968 and 1969 327's did not have the crankcase vent cast into the block. My 67 Pace Car had the correct 350 with crank cas ventilation cast in block. Only year for that ona 350. 327's were phased out for the new yuk 307 in 1969
some 327's also do not have harmonic balancer bolts. I don't know what years that is or is not specific to, but I do know it's not like that on chreefiddies.
Measure the stroke. If the stroke is 3.25 its a 307 or 327. If its 3.48 its a 350. So many of the small blocks available have been built from collections of parts that I'd be cautious of trusting any external sign that isn't a measurement.
Actually the 283 was phased out in late '67 for the 307 that came out in '68 models. The 327 was phased out in '69 and it's replacement was the already available 350. As far as breather tube in 1967 350's...... very true (one year only block). No breather tube in 68-69 327's and journal size also increased as GM was tooling up for the swap over to the 350.
To be sure, measure the stroke...for clues, look for the small damper, draft tube hole, valve covers with the little rectangle in the middle, etc.
To the best of my Knowledge all 327 blocks have a small Vertical web on the Front of the block inboard of the Passenger side water pump mount flange next to a 1/8" pipe plug. No 350 blocks have the web or plug. Also the distance between the pump flange and the Web is different between 283 and 327. The Wizzard
That would be Correct. To the best of my Knowledge "no" 350 has that rib. Also the Grove is wider on a 283 than a 327. You can feel it with your Finger when they are side by side. The Wizzard
Just an FYI, the 307 wasn't available in a Camaro until midyear 69'. It replaced the 327 as the base V8... As far as the 307 being a YUK motor, have YOU ever had the pleasure of playing around with one? They are GROSSLY underestimated. With a 283 bore and a 327 stroke, they put some pretty good horsepower/torque out for the size and they're good on gas too... They rev quick and have a strong bottom end... Change the heads, put in a better grind cam and you got something
You are right on with the 307. I had a 71 Nova with a 307, added a set of Double Hump heads (1.94) and a mild cam with a Holley 600 and Edelbrock Torker intake, headers, and that car woke up. Put a shift kit in the Turbo 350 trans also.
Lots of large journal 327's were built using 350 blocks, especially the 4 bolt blocks. The compression height of the piston (1.67 for a 327; 1.56 for A 350), or the casting number on the crankshaft should tell you what it actually is. I am Butch/56sedandelivery.
Just thought I would throw this info in...its from the How to Hot Rod Small-block Chevys....HP Books Sent from my SM-T387V using The H.A.M.B. mobile app
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