Your donations help keep this valuable resource free and growing. Thank you.
|
390 head identification |
Post Reply |
Author | |
mackb67
AMC Fan Joined: Mar/30/2014 Location: Columbia,TN Status: Offline Points: 27 |
Post Options
Thanks(0)
Posted: Jan/23/2022 at 8:33pm |
Is there a way to tell if the heads on my 1968 AMX are square port or dogleg port without removing the partially rusted out headers that are on it currently??
|
|
tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4064 |
Post Options
Thanks(0)
|
You could remove the valve cover and get the casting number. Bob tufcj
|
|
69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
|
Heavy 488
AMC Addicted Joined: Apr/27/2019 Location: In the Status: Offline Points: 3529 |
Post Options
Thanks(0)
|
Probably square unless someone swapped. I believe casting under the cover should be 858.
|
|
AMXFSTBK390
AMC Addicted Joined: Oct/22/2013 Location: SF Bay Area Status: Offline Points: 3489 |
Post Options
Thanks(0)
|
The casting number on a 1968 AMC 390 head is 318 8558 rectangular exhaust ports.
|
|
Questions are powerful tools...what's in your toolbox?
|
|
Heavy 488
AMC Addicted Joined: Apr/27/2019 Location: In the Status: Offline Points: 3529 |
Post Options
Thanks(0)
|
I knew it had 8's and 5's in there
|
|
White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
Post Options
Thanks(0)
|
I thought the difference between the two was readily visible with a mere look see at them. Nothing needs to come apart. The square ports don't have the dogleg
that appears in the bottom lower right of the port as shown in this photo. The square ports won't have that bump out in the headers or cast iron manifolds.
|
|
70 Javelin SST, second owner, purchased 1972
|
|
BassBoat
AMC Addicted Joined: Aug/29/2008 Status: Offline Points: 1713 |
Post Options
Thanks(0)
|
I have put dog leg headers on square port heads, so easiest is to pull valve cover and look for that 318 8558 number...
|
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |