The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-27-2011, 02:44 PM   #1
bsteele
Registered User
 
Join Date: Feb 2009
Location: Kershaw, South Carolina
Posts: 113
307 ?

I removed the tired old 307 from my 69 the other night and have the rebuilt 350 ready to put in. My question is does the 307 and the 327 have the same crank? I have had several people tell me they want the 307 for the crank. If this is the case I might just sit on it a while instead of selling or giving away.
bsteele is offline   Reply With Quote
Old 02-27-2011, 09:22 PM   #2
Tx Firefighter
Watch out for your cornhole !
 
Tx Firefighter's Avatar
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
Re: 307 ?

The 307 crank is shorter stroke than a 350 crank.

Last year I used a 307 crank in a 350 block which made a nice 4 bolt main 327 engine. I have already gotten another 307 crank on the shelf in my shop waiting for the next engine I build.
__________________
I'm on the Instagram- @Gearhead_Kevin
Tx Firefighter is offline   Reply With Quote
Old 02-27-2011, 09:29 PM   #3
screamin_c10
I dun gradjiated collij!!!
 
screamin_c10's Avatar
 
Join Date: Jan 2006
Location: St. Helens Oregon
Posts: 1,750
Re: 307 ?

TX - what rods and pistons did you go with?
screamin_c10 is offline   Reply With Quote
Old 02-27-2011, 09:47 PM   #4
Tx Firefighter
Watch out for your cornhole !
 
Tx Firefighter's Avatar
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
Re: 307 ?

Cheap Scat rods and Hyperutectic 327 (4.030 bore) pistons from Summit.


__________________
I'm on the Instagram- @Gearhead_Kevin
Tx Firefighter is offline   Reply With Quote
Old 02-28-2011, 01:25 AM   #5
Warrens69GMC
Registered User
 
Warrens69GMC's Avatar
 
Join Date: Jan 2003
Location: Safford,AZ
Posts: 3,613
Re: 307 ?

You can use the 307 crank AND RODS in the 350 block to make a 327.
Warrens69GMC is offline   Reply With Quote
Old 02-28-2011, 04:40 PM   #6
MARKDTN
Registered User
 
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,144
Re: 307 ?

Yes, a 307 and 327 crank are the same. (all 307 are large journal, while 327 is small journal except 1968 and heavy truck) The internal balance is a bit different, but if you have it balanced it will be fine. Kinda the same thing with a 305 and a 350. Same stroke, but mixed results if you don't rebalance the assembly.
__________________
'83 K20-TPI
'73 C10
'79 C10-ex-diesel(SOLD)
'07 Tahoe(Son driving)
'14 Suburban-DD
'71 C10-current project
MARKDTN is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:22 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com