318 with 360 heads
i was wondering what type of 360 heads should i put on my 318? i can get a set of rebuilt 360(78volare) non smog heads from advance for 200 wonder if these would be a good choice? and help would be great
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If you plan on adding a cam or the cam is bigger then stock, i would thing the 360 head would be a good idea. However you cant install you 318 manifold on them 360 head.......It won't fit. but any 340/360 will work just fine.
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Originally Posted by Cudafever
(Post 11746)
If you plan on adding a cam or the cam is bigger then stock, i would thing the 360 head would be a good idea. However you cant install you 318 manifold on them 360 head.......It won't fit. but any 340/360 will work just fine.
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Any intake manifold from a chrysler/dodge/plymouth 273 through 360 small block LA motor will fit. The heads are a good swap specially if you plan on swapping out the cam.
66 - isn't there a set of J heads (or something) that are best? |
I think the J's are the ones.
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Originally Posted by 66sportfury
(Post 11760)
why do you say this? any 318 manifold from 67 on (non magnum) will fit a 340 or a 360. with those heads you gain bigger valves and lose a little bit of compression
It was many a years ago and what i tried was kinda backward from my statement above:rolleyes: I tried to install factory 340 alu intake manifold(LD340) onto my 318. it would not physically fit as the manifold wouldn't go down far enough to start the bolts. I used a rubber mallet, stood on it.........It would not fit! After market Manifold have a slotted bolt holes in them and will fit the slight difference between the 273/318 and the 340/360. The block deck Height Is a little bit taller on the 340/360 block causing this problem. As fare as the power added from early 360 heads on a 318 i never did. so i real wouldn't know:rolleyes: Or maybe it intake surface that different tween the two heads, All i know is that it would not fit! but the after market dual plain i installed did.(dual port sp2p...I think.) |
i have a cast iron 360 manifold that was already ported out and i had on the 318 and it bolted up just fine but im probaly goin to buy a m1 dual plane intake. and its getting a bigger cam put in it. the Jheads are hard to get thats why i was asking about the 78 360 heads so it looks like so far for 200$ its my best bet just goin to do some portin on it.
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technically, X heads are the best...but like the J and U heads, theyre expensive, and getting harder to find. for how ive seen them priced, its better to get a good set of heads. also, those heads were only "great" for what they were...modern technology has left them behind, unless your goal is to use a stockish mopar head.
i have 88 360 truck heads on my mirada, 1.88/1.60 valves, ported, and ive been very happy with them. the mirada makes substantially more power than my demon 340, that has 73 340 heads. |
[quote=Cudafever;11773]The block deck Height Is a little bit taller on the 340/360 block causing this problem.
quote] actually the block height is the same on all four blocks 273,318,340 all share the crank and stroke (besides cast and forged) the 360 is the only oddball. (besides me) :D the only heads i know that are a bit different are the 64-67 273. the intake side is slightly a different angle. on to heads x heads are the best stock head you can get 202 intake 1.60 ex. all other 340 and 360 heads were 1.88 1.60 W-2was a good head also |
Originally Posted by devilkin4
(Post 11789)
i have a cast iron 360 manifold that was already ported out and i had on the 318 and it bolted up just fine but im probaly goin to buy a m1 dual plane intake. and its getting a bigger cam put in it. the Jheads are hard to get thats why i was asking about the 78 360 heads so it looks like so far for 200$ its my best bet just goin to do some portin on it.
Was the 360 intake bolted to the stock 318 heads???????? If it was then i must have done something wrong, but I tried ever thing. would not fit, put my stock 318 manifold on and it bolted right up. It is vary possible, that i did something wrong, as it was when i was a younger pup some 20 years ago:confused: My buddy, at that time had a 68 dart with a 318 and bolt on some J heads and intake, with no problem.........so i have ASSumed that the 318 head was my problem.......hmmmmmm:confused: |
all la heads bolt to all la as i said above (but i dont know about magnum) and other way around...... but some 273s and all w-2 heads.
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my understanding is that any non-magnum small block head will fit any non-magnum block, from 273 to 360. i know that a magnum head will fit a non-magnum block, but it takes some machining work, i believe? something like the bolt pattern has to be altered? as an owner of both magnum and non-magnum small blocks, i cant imagine why i would EVER put a magnum head on any of my older LA engines. honestly, i would LOVE to rip the magnum 360 out of my wifes truck in favor of my ramchargers LA360. there is a ton more bang for the buck to be had from the LA engines.
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I believe that the water passages or oil paasages do not line up either (its one of the other) between the LA and magnum heads. I have yet to build a magnum motor but I know it there is a lot more performance options out there for the LA motors than the magnum motors.
On a side note, I did see a hell of 360 stroker motor in a 98 jeep GC. All I can say is that jeep threw you back in the seat when you stumped on the go pedal. |
Originally Posted by devilkin4
(Post 11732)
i was wondering what type of 360 heads should i put on my 318? i can get a set of rebuilt 360(78volare) non smog heads from advance for 200 wonder if these would be a good choice? and help would be great
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my 88 360 heads were "swirl port"...but i dont know what size the combustion chambers are...that is what makes the difference on the compression...
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its been bored .30 over , has forged pistons,crank and rods. just got to choose a cam and get the heads, that's why i was asking about the heads. already have intake,carb and headers
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Do you know what compression ratio the slugs are supposed to be with stock heads? and what year? that way i can roughly tell you what compression you will be at with the 360 heads. and that will aid in cam selection
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sry it took my so long ive been out of town. the piston are 10 to 1
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EGR
I tryed to put a 360 intake on my 318, but the EGR was completely different. The 318 had a sideways C shape port and the intake had a rectangle. So now i have to stick to my 2 barrel till I can get some new heads. Are the Holley 500's any good?
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yeah 500 2bbl ok we use em a bit on our 245 & 265 hemi 6s
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