Camel back heads/Engine Casting #'s - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 11-18-2003, 05:50 PM
442time's Avatar
Registered User
Join Date: Nov 2003
Location: Michigan
Age: 44
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Camel back heads/Engine Casting #'s

Hi Guys I am new to building motors and I am asking for a bit of help locating answers.

(lane 1) I have the chance to grab a set of camel back heads I was wondering.

What years had these heads been made?
What casting numbers to look for?
What to look for when I do see them?
What ones should I pass on if I happen to find them?
What year is considered to be a golden find?

(lane 2) I just picked up a 350 SBC 4 bolt main I have a few questions about.

Front of the block timing area above the crank
What does the 010 to the left (PS) and the G18 to the right (DS) mean?

Back of the block bell housing Pass side again I see the 010 cast also.
What does the casting H24 and the WR just under it Mean?

The block casting # 3970010
above that casting # it reads 41GM whats that mean?
How will I know what year it is?

The stampings on the block from what I can see they read.
V021 CTR how do I know what that is?

Just under that there is a number that reads.
C8F407435 Whats that?

I think that does it I have just one more question.

Would the camel back heads and block make a good combonation?

Thanks in advance

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 11-18-2003, 07:26 PM
Jmark's Avatar
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 64
Posts: 5,033
Wiki Edits: 0

Thanks: 124
Thanked 103 Times in 83 Posts
Camel Hump heads, or also called Double Hump heads were great 35 years ago. Save a few more bucks and go with something newer and better. Most of the aftermarket heads are light years ahead now.

The block needs to be checked by a machine shop for cracks and excessive core shift before you buy it. If its been bored before, how much?

The 010 under the timing area refers to the %content of Nickel ( I believe anyway). Thats a good thing.

As far as the rest of the numbers, I don't have a clue.

Boils down to finding a good rebuildable block and work with a good reputable machine shop on what to do and not break your bank.

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-18-2003, 08:12 PM
DoubleVision's Avatar
Not Considered a Senior Member
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 43
Posts: 10,733
Wiki Edits: 0

Thanks: 19
Thanked 77 Times in 71 Posts
From what I found, the CTR suffix code says this block is from a 1970 LT -1. if this is a true LT- 1 then it would be worth considerable money to a collector.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-18-2003, 09:06 PM
GearHead69's Avatar
'70 Chevelle '70 C10
Last photo:
Join Date: Jun 2003
Location: Emden IL
Age: 29
Posts: 271
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
When I'm looking for double hump heads I usually glance at the last three numbers on the castings like "461x" "461" "462" "492" I would say the worst double hump head is the 3782461. If you find a X head.. 3782461X that's a very good head and good to look for, they are very rare and you probably won't find a set for under $300. The casting # 3991492 or just "492" is what I run on my 13:1 355 roller motor they are IMO the best head GM ever made. Myn are the over the counter version with small chamber appx 61cc with screw in studs, accessory holes and angled plugs. There are only a few diferent double hump castings so it's not that hard to get confused. I am 15 and I have build 3 SBC engines by myself in my life. I hang out with guys who run 8's and they teach me tricks and tips one guy let me drive his '67 Chevelle with a 14.5:1 434 Small block extremely fast car, it scared the hell out of me when I hit the gas and shifted and seconds later we were going 120.. Anyway I learned to port heads by these guys, I have many hours in my heads porting them I cut the pockets to 1.550 they have Canfield 750 lift roller springs Elgin race Flo valves 2.02/ 1.60's In 28" of water they flowed 273cfm on the intake and 192cfm exhaust @.600 lift. That shows what double hump heads are capable of with some good porting. I paid 100 for the heads bare.. I ported them myself.. valves were like $80, I bought the springs, titanium retainers and 10deg Super Locks for $50. borrowed a seat cutter from my local machine shop. Magnafluxed and 3 angle valve job: $180 I have a high flowing head with only about 400 total wrapped up in them and they are roller ready.

Here's some pics and info on my website Go to Chevelle page then heads..

Also a good site: here
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-19-2003, 01:19 PM
442time's Avatar
Registered User
Join Date: Nov 2003
Location: Michigan
Age: 44
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the info guys
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-18-2005, 07:31 PM
Registered User
Last photo:
Join Date: Oct 2005
Location: Wichita Ks
Posts: 17
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
casting #

I have gone to a site called MorTec, they give all the info for the gm castings

Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -6. The time now is 12:58 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.