[Skip Fix]

My 15s are still as greasy as the day I pulled them off 20 years ago and bone stock! Shipping might be a killer from Texas. 62 is tanked years ago and surface rust.

["QUICK-SILVER"]

Has this engine been DE-tuned for pump gas?

Does the 4bbl open all the way when you mash the gas pedal?

IMO Project like this would need some high octane fuel with a "performance" tune-up.

Clay

[Vckline313]

Originally Posted by "QUICK-SILVER"

Has this engine been DE-tuned for pump gas?



Does the 4bbl open all the way when you mash the gas pedal?



IMO Project like this would need some high octane fuel with a "performance" tune-up.



Clay

I run 91 ethanol free gas or regular 93 from anywhere. Sometimes mix 110 in, but don't notice the difference I do it for the smell

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[MarkS57]

Originally Posted by Tom Vaught

Obviously the cylinder head picture posted in the beginning of the thread is different from the last couple of pictures of the 'other' head with the easily seen screw in rocker studs and rockers.

So I need some info on exactly what you are asking for in this thread.

Tom V.

Exactly. The original pic of the cylinder head being mounted on the right side of the engine makes no sense. Isn't there a brand new freeze plug in the water port where the manifold water feed should go? I guess its possible the original builder sent the OP some incorrect pics.

That's why I asked him to pop the other valve cover.

[Vckline313]

Originally Posted by MarkS57

Exactly. The original pic of the cylinder head being mounted on the right side of the engine makes no sense. Isn't there a brand new freeze plug in the water port where the manifold water feed should go? I guess its possible the original builder sent the OP some incorrect pics.



That's why I asked him to pop the other valve cover.

I will check it out tomorrow but it looks like I'd have to remove the ac compressor to do that. But I can tell for sure the head on pass side is cast 62

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[MarkS57]

Originally Posted by Vckline313

I will check it out tomorrow but it looks like I'd have to remove the ac compressor to do that. But I can tell for sure the head on pass side is cast 62

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Hi OK, is the pic from post 16 the driver's side? If so, you may have 62's on both sides.

[Vckline313]

Originally Posted by MarkS57

Hi OK, is the pic from post 16 the driver's side? If so, you may have 62's on both sides.

I have 62 casting numbers on both sides. But pics from post 16 are driver side

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[MarkS57]

Originally Posted by Vckline313

I have 62 casting numbers on both sides. But pics from post 16 are driver side

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OK, 62's are no slouches. If you can check one more thing, see attached. Does your engine have the pyramid projection behind the passengers side valve cover shown in the red circle of the attached?

[Vckline313]

Originally Posted by MarkS57

OK, 62's are no slouches. If you can check one more thing, see attached. Does your engine have the pyramid projection behind the passengers side valve cover shown in the red circle of the attached?

I'll check in the am. What is the significance of this?

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[F ROCK]

The best way to know for sure what gears are in there is to pull the cover and see what's in there. Get the numbers off of the ring gear or count the teeth. You'll also know for sure if it's got a posi unit.
Sounds like a pretty good combo, Hope you can get it optimized.

[MarkS57]

Originally Posted by Vckline313

I'll check in the am. What is the significance of this?

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The pyramid signifies a 428 or 455 block; 400's & 350's do not have it.

[Vckline313]

Originally Posted by MarkS57

The pyramid signifies a 428 or 455 block; 400's & 350's do not have it.

Block is cast with 455

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[MarkS57]

Originally Posted by Vckline313

Block is cast with 455

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Sorry I missed this in post 36:

"So I got a chance to go through the things, car has matching 62 heads on it and is a 455.
Are 62 heads worth having gone through (finding a machine shop to do it will also be a hassle around here) or just buy a set of 6x from nitemare performance for about 1500$"

Still, its odd to find 62's on a 455. You need a piston dish better than 15cc maybe 20cc to make it streetable. Do you have problems with denotation, ping?

[Vckline313]

Originally Posted by MarkS57

Sorry I missed this in post 36:



"So I got a chance to go through the things, car has matching 62 heads on it and is a 455.

Are 62 heads worth having gone through (finding a machine shop to do it will also be a hassle around here) or just buy a set of 6x from nitemare performance for about 1500$"



Still, its odd to find 62's on a 455. You need a piston dish better than 15cc maybe 20cc to make it streetable. Do you have problems with denotation, ping?

When I turned the timing up it did detonate. But that was me trying to time it by myself with little to know experience

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[Joe's Garage]

On a 455 the compression will be pretty high, but it should make plenty of power.

MarkS57 asked about detonation. You said it detonated when you 'turned the timing up'.

What initial and total timing do you have now and how much timing did you add to make it detonate?
Sometimes, even when you can't hear it, the detonation is still going on.

We've run several 455s at different times with flat-top pistons and '62' heads and always had to either mix fuel or run race fuel to get acceptable performance. The cylinder pressure was always too high for 91 or 93 octane pump fuel.

But when we either mixed 110 octane with 93 octane - or even ran the 110 octane straight - they were tire shredders. Even with 3.08 gears. 3.55s just made it worse. I gotta believe that a good-running higher-compression 455 would still smoke the tires - even with 2.56s.

Many guys have run the 72cc heads - like your 62 castings - on 455s with flat-top pistons and made it work well by using larger cams to bleed off cylinder pressure.

I think you need to figure out what exactly is inside your engine and what parts are not working well together. I doubt that the '62' heads are the 'problem' part.

Good luck!

[Vckline313]

Originally Posted by Joe's Garage

On a 455 the compression will be pretty high, but it should make plenty of power.

MarkS57 asked about detonation. You said it detonated when you 'turned the timing up'.

What initial and total timing do you have now and how much timing did you add to make it detonate?
Sometimes, even when you can't hear it, the detonation is still going on.

We've run several 455s at different times with flat-top pistons and '62' heads and always had to either mix fuel or run race fuel to get acceptable performance. The cylinder pressure was always too high for 91 or 93 octane pump fuel.

But when we either mixed 110 octane with 93 octane - or even ran the 110 octane straight - they were tire shredders. Even with 3.08 gears. 3.55s just made it worse. I gotta believe that a good-running higher-compression 455 would still smoke the tires - even with 2.56s.

Many guys have run the 72cc heads - like your 62 castings - on 455s with flat-top pistons and made it work well by using larger cams to bleed off cylinder pressure.

I think you need to figure out what exactly is inside your engine and what parts are not working well together. I doubt that the '62' heads are the 'problem' part.

Good luck!

It'll roast the tires now with 295/25/22 tires and scream on the interstate. But it's like after the tires stop spinning im really not going any where if that makes any sense

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[Formulas]

Take a compression reading, report back

[Kenth]

Originally Posted by Vckline313

Looking at info on these heads and manifolds. Manifolds I assume are regular factory ones. Curious on the heads which were supposed to be "worked" these pics were sent to me from previous builder from when the motor was assembled probably 10 years ago.

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Is it really this engine in question?
I may be missing something but this head in not #62.
Also, the head in lower pic sits on wrong side.

[72projectbird]

Originally Posted by MarkS57

Sorry I missed this in post 36:

"So I got a chance to go through the things, car has matching 62 heads on it and is a 455.
Are 62 heads worth having gone through (finding a machine shop to do it will also be a hassle around here) or just buy a set of 6x from nitemare performance for about 1500$"

Still, its odd to find 62's on a 455. You need a piston dish better than 15cc maybe 20cc to make it streetable. Do you have problems with denotation, ping?

I had a 455 .060 over with 62 heads, forged pistons with a 7cc valve relief, and it ran on pump 93.

[Vckline313]

Updated pics of the heads with both valve covers off while I repainted them and the intake and installing a smi carb

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