CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
December 18, 2014, 04:45:37 PM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
107472 Posts in 12503 Topics by 4810 Members
Latest Member: rustoleumm
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Mild Modifications
| | |-+  Engine swap--are all 327s the same?
« previous next »
Pages: 1 [2]  All Print
Author Topic: Engine swap--are all 327s the same?  (Read 5718 times)
randfr
Member
***
Posts: 26


View Profile
« Reply #15 on: May 08, 2014, 09:49:48 PM »

67 and older engines were vented from the oil filler and a canister in the lifter valley which led to a hole near the distributer. In 68 this canister and the hole went away. Ventilation was done with a hole in each valve cover, one to let air in and the other to draw out crankcase air. So when you look at a 67 engine there are no holes in the valve covers and 68,s had one in each. these are two different systems. The deal is if you want it look like a 67 you will need a 67 or older block. If you want it to look that correct.

I looked at some photos of the engine before I put it in storage.  I was either lucky or knew what I was doing and subsequently forgot, b/c the covers are plain chrome and have holes in each cover.

I just googled some images from 68 Corvettes and found images that look familiar.  The images show a metal elbow emerging from the passenger side valve cover leading to a rubber line that makes a turn and ducking under the rear of a big chrome air cleaner.  The driver's side has a similar metal elbow and smaller diameter rubber hose but dives under the front of the air cleaner.

I think they go into the air cleaner, but I'm all googled out for the evening.  Thanks for the help!
Logged
hotrod68
Hero Member
*****
Posts: 520


almost finished

rusticman48@aol
View Profile Email
« Reply #16 on: May 10, 2014, 11:09:23 PM »

1967 and back 327s had a canister oil filter and a breather tube behind the intake manifold. In 1968 they went to a spin-on filter. '67-back 327s also had different cranks with different size bearings, so there is a small-journal and a large-journal 327, the '68 and '69 being the large-journal. Pre-68 327 cranks were forged, '68 and up were cast. In 1969 and some late '68s the heads were cast differently and the '69 heads had accessory bolt holes for the longer water pump. Hope this helps.
Logged

HotRod'68  1968 SS350 coupe undergoing frame-off resto/rod. 386/350/4.11s
Butternut Yellow    black standard interior
randfr
Member
***
Posts: 26


View Profile
« Reply #17 on: May 14, 2014, 09:51:26 PM »

1967 and back 327s had a canister oil filter and a breather tube behind the intake manifold. In 1968 they went to a spin-on filter. '67-back 327s also had different cranks with different size bearings, so there is a small-journal and a large-journal 327, the '68 and '69 being the large-journal. Pre-68 327 cranks were forged, '68 and up were cast. In 1969 and some late '68s the heads were cast differently and the '69 heads had accessory bolt holes for the longer water pump. Hope this helps.

hotrod68--at this point, everything helps!

I remember complaining about the old canister oil filter on the original engine.  Now I wish I had that old engine and canister to complain about!

Seems I'm "stuck" with the 68 look due to the PVC system, but I'm ok with that.  I've made some other modest trade-offs/upgrades with this painfully slow home grown restoration, mostly for safety and drive-ability.

Somewhere in this forum I've seen discussion about engine mounts and motor mount bracket differences for different small engine/horsepower combinations on the 1st gen.  Since my 327 motor will have much more output than the original 327, what recommendations on engine mounts/brackets would you make?
Logged
hotrod68
Hero Member
*****
Posts: 520


almost finished

rusticman48@aol
View Profile Email
« Reply #18 on: May 15, 2014, 02:02:18 AM »

   Rand.....you can put a Welch plug in the back of the early block and run a PCV system with no problem. There are kits to convert the canister filter to a spin-on filter as well. The early 327s were virtually indestructible on the bottom end because of the stronger crank. If you want the later block, any 350 will work. The only difference in a 350 and a 327 is the crank and the pistons, but you must use a large-journal crank with a 350 block. All had 5.7" rods.
   As far as engine mounts, they were all the same physically except for the Z/28 and 350 as far as I know. The higher-power engines used an interlock in the rubber instead of just solid rubber. As for me, I use the urethane mounts. They are stronger than the rubber mounts and they won't rot. They don't look original, but as for me they are far superior. The frame mounts are all the same as far as how everything bolts up.
  One other thing--the early 327s used a different, smaller harmonic balancer and the timing tabs on the timing cover were different because of the diameter and welded to the cover. Later engines used a bolt-on tab. With a hotrod buildup this becomes a moot point with speed parts,  but it's one of the anomalies.
  Again....good luck and I hope this helps!
Logged

HotRod'68  1968 SS350 coupe undergoing frame-off resto/rod. 386/350/4.11s
Butternut Yellow    black standard interior
JohnZ
CRG Member
*****
Posts: 4158


View Profile Email
« Reply #19 on: May 15, 2014, 02:15:42 PM »


Somewhere in this forum I've seen discussion about engine mounts and motor mount bracket differences for different small engine/horsepower combinations on the 1st gen.  Since my 327 motor will have much more output than the original 327, what recommendations on engine mounts/brackets would you make?

That's covered here:

http://www.camaros.org/engine.shtml#EngineMounting
Logged

'69 Z/28
Fathom Green
CRG
Hideawaze
Newbie
*
Posts: 17


View Profile
« Reply #20 on: May 16, 2014, 06:56:50 PM »

  If you like the stock breathers, never had any luck fitting on to Holley carbs, end up looking like everybody else at the shows  aftermarket
Logged
JohnZ
CRG Member
*****
Posts: 4158


View Profile Email
« Reply #21 on: May 17, 2014, 11:24:48 AM »

  If you like the stock breathers, never had any luck fitting on to Holley carbs, end up looking like everybody else at the shows  aftermarket

There were stock open-element air cleaners each year for Holley carburetors.
Logged

'69 Z/28
Fathom Green
CRG
Pages: 1 [2]  All Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.076 seconds with 18 queries.