Author Topic: J Head Identification  (Read 809 times)

Offline daveh

  • Full Member
  • ***
  • Posts: 813
J Head Identification
« on: April 12, 2010 - 03:45:30 PM »
Hi guys,

How can I tell if I have J heads on my 340?  Or how can I tell what kind of heads I have?  Thanks

Dave




Offline Chryco Psycho

  • Administrator
  • C-C.com Guru
  • *****
  • Posts: 36620
  • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
Re: J Head Identification
« Reply #1 on: April 12, 2010 - 07:17:49 PM »
if you look down by the lower head bolts by the #3 spark plug you will see a J or an O cast there , if you have  the valve cover off it will have a casting #3 on the intake runner that should end in 915

Challenger - You`ll wish You Hadn`t

Offline moparnut

  • Resident
  • *****
  • Posts: 2410
  • Nutin like a nice Piece of Hickory"Clint Eastwood
    • My Photo's
Re: J Head Identification
« Reply #2 on: April 15, 2010 - 10:45:46 AM »
not all 2.02 heads are j, i have a set on a 70 340 i bought that have O heads and 2.02 valves manufactured in late 69.
70 Barracuda Gran Coupe,383-4bbl,# Match
2012 Subaru Forester
70 D100 Adventurer 383 pickup
02 F250 S'cab Powerstroke 7.3 4x4 6 speed Manual
06 Honda VTX1800S Spec 3

Offline daveh

  • Full Member
  • ***
  • Posts: 813
Re: J Head Identification
« Reply #3 on: April 16, 2010 - 11:37:57 AM »
That's what I think I have.