EQ heads on my 360

[SRWing]

I've got these heads that were on the engine in my Barracuda. I can't find any casting numbers in the usual places but have these on the ends : EQ CH318 1568. Where can I find out some details on these heads, like chamber volume, valve sizes etc. I'm not planning on reusing them. Going with aluminum heads but I would like to know what these are.
Thanks.

 

[273]

There replacement magnum heads if there the older Australian ones they make a good performance piece if already gone through (valves and porting) maybe same/better than the aluminum ones you might be getting.

 

[SRWing]

Ok, thanks. Any idea where i can get the cc volume? They have 1 stuck exhaust valve and deffinatly need a valve job.

 

[273]

318 / 360 Chrysler Magnum Assembled Cylinder Head Early L.A. Bolt Pattern – Pair - Part #EQ-CH318BA​

With LA Style Intake Bolt Pattern, Replaces Casting Numbers: 53005714, 53006671, 53020466, 53020468, 172CC Intake Runner, 62CC Combustion Chamber – ASSEMBLED. Made from the highest grade cast iron.

 

[Professor Fate]

Is this an LA 360 or a Magnum 5.9?
EQs are replacement Magnum heads: the newer China cast heads have a core plug on the ends, the older NZ heads have no core plug and are a generally better-finished head, and better performing.
If either of these are mounted on an LA (you did call it a 360, and posted under Small Blocks instead of Magnum forum, so I'm just guessing here) then you will have non-standard valvetrain pieces- lifters with oil holes, hollow pushrods, etc. to facilitate rocker oiling since Magnum heads do not oil through the block like LAs do.
Current EQs have an advertised chamber volume of 62cc.

 

[TT5.9mag]

If they are the older quality EQ heads you might want to consider keeping them. They’re a damn nice mild performance head for 420ish hp.

 

[SRWing]

318 / 360 Chrysler Magnum Assembled Cylinder Head Early L.A. Bolt Pattern – Pair - Part #EQ-CH318BA​

With LA Style Intake Bolt Pattern, Replaces Casting Numbers: 53005714, 53006671, 53020466, 53020468, 172CC Intake Runner, 62CC Combustion Chamber – ASSEMBLED. Made from the highest grade cast iron.

Thanks. That's the info I was looking for perfect.

 

[SRWing]

Is this an LA 360 or a Magnum 5.9?
EQs are replacement Magnum heads: the newer China cast heads have a core plug on the ends, the older NZ heads have no core plug and are a generally better-finished head, and better performing.
If either of these are mounted on an LA (you did call it a 360, and posted under Small Blocks instead of Magnum forum, so I'm just guessing here) then you will have non-standard valvetrain pieces- lifters with oil holes, hollow pushrods, etc. to facilitate rocker oiling since Magnum heads do not oil through the block like Magnums do.
Current EQs have an advertised chamber volume of 62cc.

This is a LA engine. I was confused about what it was at first but a mopar knowledgeable friend told me they are indeed LA heads . Yes it oils through the push rods and the rockers are stud mounted. No core plugs.

 

[TT5.9mag]

This is a LA engine. I was confused about what it was at first but a mopar knowledgeable friend told me they are indeed LA heads . Yes it oils through the push rods and the rockers are stud mounted. No core plugs.

Stud mounted rockers and oil through pushrods are magnum stuff. The bottom end could either magnum or LA. No core plugs is good. Sounds like a good engine to build on.

 

[Professor Fate]

This is a LA engine. I was confused about what it was at first but a mopar knowledgeable friend told me they are indeed LA heads . Yes it oils through the push rods and the rockers are stud mounted. No core plugs.

Nope. Not even remotely could they be considered LA heads (ALL factory LAs have shaft mount rockers and oil through the block & heads).
I'd take everything your "friend" says with a grain of salt.

 

[SRWing]

Stud mounted rockers and oil through pushrods are magnum stuff. The bottom end could either magnum or LA. No core plugs is good. Sounds like a good engine to build on.

I just keep learning more and more about this engine.

 

[Professor Fate]

I just keep learning more and more about this engine.

Post some pics- block, heads, block dates/casting numbers, etc.
We'll be able to tell ya a whole lot more!

 

[67Dart273]

You can convert an LA to use Magnum heads but there are special considerations and parts you must use. There is or was a website that listed all the little things, but I am unable to find it presently

 

[TT5.9mag]

You can convert an LA to use Magnum heads but there are special considerations and parts you must use. There is or was a website that listed all the little things, but I am unable to find it presently

AMC lifters and hollow pushrods. That’s all you need to run magnum heads on an la bottom end.

 

[67Dart273]

AMC lifters and hollow pushrods. That’s all you need to run magnum heads on an la bottom end.

Well but you need different heat bolts doncha? I don't trust my memory. I KNOW you KNOW, LOL

 

[TT5.9mag]

Well but you need different heat bolts doncha? I don't trust my memory. I KNOW you KNOW, LOL

Well, yea all the supporting hardware as well as the intake manifold will have to be magnum also, but that’s a given.

 

[SRWing]

Post some pics- block, heads, block dates/casting numbers, etc.
We'll be able to tell ya a whole lot more!

Ok, here's what I found. I'll attach head pics next reply. Thanks

 

[SRWing]

Post some pics- block, heads, block dates/casting numbers, etc.
We'll be able to tell ya a whole lot more!

Only numbers in could find in the heads was EQ-CH318. With 1568 under the eq#. They have pedestal mount adjustable rockerarms and oil through the pushrods.

 

[PRH]

Looks like they’ve already got a couple of upgrades…….
Screw-in studs and guide plates and aftermarket beehive springs.
Measure the diameter of the intake valves, they might have 2.02’s installed.

It’s pretty widely known that aftermarket magnum heads often have guide issues.
Easily fixed by installing a set of bronze liners.

 

[TT5.9mag]

What happened to the deck surface of the head in your first pic? Looks like it fell out of a truck and slid down the street.

 

[cookietruck]

Need to see a pic of the end of head. Im guessing those are the nice old castings. There is a shop that did alot of those heads with a good valve job and beehive springs…if they’re the same then you won’t be picking up much with just a head swap to edelbrocks or anything. Probably will do worse with speedmasters.

 

[SRWing]

Need to see a pic of the end of head. Im guessing those are the nice old castings. There is a shop that did alot of those heads with a good valve job and beehive springs…if they’re the same then you won’t be picking up much with just a head swap to edelbrocks or anything. Probably will do worse with speedmasters.

Thanks. Ya, I'm thinking of giving these heads a good valve job and new springs. Thinking the aluminum heads would only be weight savings plus my much lighter wallet.

 

[TT5.9mag]

Thanks. Ya, I'm thinking of giving these heads a good valve job and new springs. Thinking the aluminum heads would only be weight savings plus my much lighter wallet.

Why? Have you tested the springs? Have you had a cylinder head guy look at the valve job? Before just throwing money at them for no reason, get the opinion of someone who builds cylinder heads.

 

[SRWing]

Why? Have you tested the springs? Have you had a cylinder head guy look at the valve job? Before just throwing money at them for no reason, get the opinion of someone who builds cylinder heads.

Yup, that's the plan.