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72 360 head ID #1732207 01/17/15 04:18 PM 01/17/15 04:18 PM
Joined: Feb 2003 Posts: 1,306 Laveen, Arizona GTSDart340 OP pro stock
GTSDart340 OP pro stock Joined: Feb 2003 Posts: 1,306 Laveen, Arizona	I have a 72 motorhome 360, 2 barrel. The casting number on the heads is 34189156. I found the number 3418915, which says it's a 71-2 360 head, but I can't find any with the extra 6 on the end. Would these be "j" heads? Thanks. 1949 International KB-2 "Mater" - 302/T5 1968 Dodge Dart GTS "The Drat" - 340/727 2006 Dodge Magnum R/T - Hemi 2016 Dodge Durango Limited - 3.6

Re: 72 360 head ID [Re: GTSDart340] #1732208 01/17/15 04:21 PM 01/17/15 04:21 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	is that number a 3418915-6. live every 24 hour block of time like it's your last day on earth

Re: 72 360 head ID [Re: RapidRobert] #1732209 01/17/15 04:22 PM 01/17/15 04:22 PM
Joined: Feb 2003 Posts: 1,306 Laveen, Arizona GTSDart340 OP pro stock
GTSDart340 OP pro stock Joined: Feb 2003 Posts: 1,306 Laveen, Arizona	Its hard to tell, as the engine is still together. It probably is. It's in a shed, so it's kinda difficult to get to. 1949 International KB-2 "Mater" - 302/T5 1968 Dodge Dart GTS "The Drat" - 340/727 2006 Dodge Magnum R/T - Hemi 2016 Dodge Durango Limited - 3.6

Re: 72 360 head ID [Re: GTSDart340] #1732210 01/17/15 05:54 PM 01/17/15 05:54 PM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	Probably just a J head with 1.88 intake valves

Re: 72 360 head ID [Re: GTSDart340] #1732211 01/17/15 11:41 PM 01/17/15 11:41 PM
Joined: Dec 2003 Posts: 2,042 Leucadia, Ca. V vdriver top fuel
vdriver top fuel V Joined: Dec 2003 Posts: 2,042 Leucadia, Ca.	Yep, 915 J heads. Note the big "J" in the casting below; there should also be one on the outside between the spark plug holes. Don't be surprised if they're cracked. 8399747-Jhead.jpg (84 downloads)

Re: 72 360 head ID [Re: vdriver] #1732212 01/20/15 04:06 PM 01/20/15 04:06 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Yeah, it's a "magical" J head, pull'em and sell to some fool who thinks they are trick. They were used on 340s back in the day, so they have street cred. The fact that Mopar engines many times used exact same components across the performance range seems to have escaped the hoi polloi. R.

Re: 72 360 head ID [Re: dogdays] #1732213 01/20/15 04:21 PM 01/20/15 04:21 PM
Joined: Jun 2005 Posts: 5,107 Western Md. skicker "The Champ"
skicker "The Champ" Joined: Jun 2005 Posts: 5,107 Western Md.	Quote: Yeah, it's a "magical" J head, pull'em and sell to some fool who thinks they are trick. They were used on 340s back in the day, so they have street cred. The fact that Mopar engines many times used exact same components across the performance range seems to have escaped the hoi polloi. R. ...FAFO...

Re: 72 360 head ID [Re: skicker] #1732214 01/20/15 04:31 PM 01/20/15 04:31 PM
Joined: Jan 2003 Posts: 29,654 Hamtramck, PA A Alaskan_TA Fluffy Balladeer
Alaskan_TA Fluffy Balladeer A Joined: Jan 2003 Posts: 29,654 Hamtramck, PA	The 915 castings can be J, O, U or Z heads, the letter itself means nothing.

Re: 72 360 head ID [Re: Alaskan_TA] #1732215 01/20/15 05:32 PM 01/20/15 05:32 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Quote: The 915 castings can be J, O, U or Z heads, the letter itself means nothing. And the 915 casting can have 2.02 or 1.88" intake valves, the number means little in and of itself. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: 72 360 head ID [Re: Supercuda] #1732216 01/20/15 05:33 PM 01/20/15 05:33 PM
Joined: Jan 2003 Posts: 29,654 Hamtramck, PA A Alaskan_TA Fluffy Balladeer
Alaskan_TA Fluffy Balladeer A Joined: Jan 2003 Posts: 29,654 Hamtramck, PA	They can also be T/A heads. The 915s were pretty popular.

Re: 72 360 head ID [Re: dogdays] #1732217 01/20/15 05:56 PM 01/20/15 05:56 PM
Joined: Oct 2003 Posts: 7,863 Colorado Leadfoot master
Leadfoot master Joined: Oct 2003 Posts: 7,863 Colorado	Quote: Yeah, it's a "magical" J head, pull'em and sell to some fool who thinks they are trick. They were used on 340s back in the day, so they have street cred. The fact that Mopar engines many times used exact same components across the performance range seems to have escaped the hoi polloi. R. And if they had an "X" on them people lose their minds. They open their wallets and send all logic and reason out the window.

Re: 72 360 head ID [Re: Leadfoot] #1732218 01/20/15 09:38 PM 01/20/15 09:38 PM
Joined: Feb 2003 Posts: 1,306 Laveen, Arizona GTSDart340 OP pro stock
GTSDart340 OP pro stock Joined: Feb 2003 Posts: 1,306 Laveen, Arizona	They are going to be used on my 408 project, at least until I can afford some aluminum heads. I will put the 2.02 valves in them. 1949 International KB-2 "Mater" - 302/T5 1968 Dodge Dart GTS "The Drat" - 340/727 2006 Dodge Magnum R/T - Hemi 2016 Dodge Durango Limited - 3.6

Re: 72 360 head ID [Re: GTSDart340] #1732219 01/21/15 02:51 PM 01/21/15 02:51 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	I believe there are several articles floating around on productive modifications to the intake ports and it is possible to get 250cfm from them with basic porting. I'd more suggest you use the $ you would have spent on the larger valves and put it towards porting and a competition valve job. There's more hp in that. R.

Re: 72 360 head ID [Re: Alaskan_TA] #1732220 01/21/15 05:06 PM 01/21/15 05:06 PM
Joined: Jan 2003 Posts: 1,255 Columbus, GA Michael Ecks pro stock
Michael Ecks pro stock Joined: Jan 2003 Posts: 1,255 Columbus, GA	Quote: The 915 castings can be J, O, U or Z heads, the letter itself means nothing. If I am remembering right I have a "I" head and a "II" head on my 360 at least between the spark plugs. Regular big J underneath both. "The happiness of your life depends upon the quality of your thoughts" ~ Roman Emperor Marcus Aurelius

Re: 72 360 head ID [Re: Michael Ecks] #1732221 01/21/15 07:34 PM 01/21/15 07:34 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	What do you want more low end torque or top end. If you want more low end I know some circle track guys that have gone back to the 1.88 valve over the 2.02 and have gained a lot of low end coming out of the turns. Personally I switched from 1.88 to 2.02 and gained absolutely nothing when I had my duster. Both set had the same cut to the same CC other than that were in stock form.

Re: 72 360 head ID [Re: MoparforLife] #1732222 01/21/15 08:12 PM 01/21/15 08:12 PM
Joined: Feb 2003 Posts: 1,306 Laveen, Arizona GTSDart340 OP pro stock
GTSDart340 OP pro stock Joined: Feb 2003 Posts: 1,306 Laveen, Arizona	It's going to be a mostly street but occasionally strip car. I want it (68 Dart) to be able to take down a 69 Skylark with a 455... So I'm looking at low 12s high 11s. I want it on the edge of being legal without a cage. At this point, it's all in the planning stage. Thanks guys! 1949 International KB-2 "Mater" - 302/T5 1968 Dodge Dart GTS "The Drat" - 340/727 2006 Dodge Magnum R/T - Hemi 2016 Dodge Durango Limited - 3.6

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